Below is an example of how you can make your own moderation comments using filter – Add the below code to your functions.php and adapt it to your liking:

Requires: Frontier Post version 4.4.1 or above

function fp_my_mod_cmt( $fp_moderation_comments_new, $fp_moderation_comments_old, $my_post, $tmp_task_new, $formdata ) 
   {
   global $current_user;
	
   $fp_my_cmts  = mysql2date( 'd-m-Y', $my_post->post_date);
    $fp_my_cmts .= " USER: ".$current_user->user_firstname." ".$current_user->user_lastname.":<br>";
   $fp_my_cmts .= $fp_moderation_comments_new."<br>";
   $fp_my_cmts .= '<hr>'."<br>";
   $fp_my_cmts .= $fp_moderation_comments_old."<br>";
	
   return $fp_my_cmts;
}

add_filter( 'frontier_post_mod_cmt_update', 'fp_my_mod_cmt', 20, 5 );

below is the code for the filter:

//***************************************************************************************
//* Save post moderation fields
//***************************************************************************************

if ( fp_get_option_bool("fps_use_moderation") && (current_user_can("edit_others_posts") || $current_user->ID == $my_post->post_author))
	{
	if (isset($_POST['frontier_post_moderation_new_text']))
		{
		$fp_moderation_comments_new = $_POST['frontier_post_moderation_new_text'];
		//$fp_moderation_comments_new = trim(stripslashes(strip_tags($fp_moderation_comments_new)));
		$fp_moderation_comments_new = wp_strip_all_tags($fp_moderation_comments_new);
		$fp_moderation_comments_new = nl2br($fp_moderation_comments_new);
		$fp_moderation_comments_new = stripslashes($fp_moderation_comments_new);
		$fp_moderation_comments_new = trim($fp_moderation_comments_new);
		if (strlen($fp_moderation_comments_new) > 0)
			{
			global $current_user;
			//$tmp_date_format = fp_get_option('fps_date_format_lists', 'Y-m-d');
			$fp_moderation_comments_old = get_post_meta( $my_post->ID, 'FRONTIER_POST_MODERATION_TEXT', true );
			//$fp_moderation_comments  = current_time( 'mysql')." - ".$current_user->user_login.":<br>";
			$fp_moderation_comments  = mysql2date(fp_get_option('fps_date_format_lists', 'Y-m-d'), $my_post->post_date);
			$fp_moderation_comments .= " - ".$current_user->user_login.":<br>";
			$fp_moderation_comments .= $fp_moderation_comments_new."<br>";
			$fp_moderation_comments .= '<hr>'."<br>";
			$fp_moderation_comments .= $fp_moderation_comments_old."<br>";
			
			//****************************************************************************************************
			// Apply filter before update of moderation comments
			// filter:						frontier_post_mod_cmt_update
			// $fp_moderation_comments_new	New comments entered by the users
			// $fp_moderation_comments_old	Previous Comments
			// $my_post 					Post record object 
			// $tmp_task_new  				Equals true if the user is adding a post
			// $_POST						Input form	
			//                  			FRONTIER_POST_MODERATION_TEXT in $_POST is where the moderation momments are enterd
			//****************************************************************************************************

			$fp_moderation_comments = apply_filters( 'frontier_post_mod_cmt_update', $fp_moderation_comments_new, $fp_moderation_comments_old, $my_post, $tmp_task_new, $_POST );
			
			update_post_meta( $my_post->ID, 'FRONTIER_POST_MODERATION_TEXT', $fp_moderation_comments );
			update_post_meta( $my_post->ID, 'FRONTIER_POST_MODERATION_DATE', current_time( 'mysql'));
			update_post_meta( $my_post->ID, 'FRONTIER_POST_MODERATION_FLAG', 'true');
			// Email author on moderation comments
			if (isset($_POST['frontier_post_moderation_send_email']) && $_POST['frontier_post_moderation_send_email'] == "true")
				{
				$to      		= get_the_author_meta( 'email', $my_post->post_author );
				$subject 		= __("Moderator has commented your pending post", "frontier-post")." (".get_bloginfo( "name" ).")";
				$body    		= __("Moderator has commented your pending post", "frontier-post").": ".$my_post->post_title ." (".get_bloginfo( "name" ).")"."\r\n\r\n";
				$body    		.= "Comments: ".$_POST['frontier_post_moderation_new_text']."\r\n\r\n";


				if( !wp_mail($to, $subject, $body ) ) 
					frontier_post_set_msg(__("Message delivery failed - Recipient: (", "frontier-post").$to.")");
				}
			}
		}
	
	}

.