[serks]

Thanks for response Stephan,
I actually managed to do this by using some code in loop-search.php and I used the same code in loop-replies.php…heres the code that does it…

<?php if(get_post_type() == 'reply'):?>

       <?php // CHECK IF THIS REPLY IS UNDER MEMBERS ONLY FORUM.
       $parent = array_reverse(get_post_ancestors($post->ID)); // get an array of all the parent pages in order from most distant to closest.
       $first_parent = get_page($parent[0]); //get the first page in the array, which is the most distant parent
       $int = apply_filters('the_ID', $first_parent->ID); //filter the $first_parent to get only the wordpress page/post ID, which is an integer like 49 or 565. store it as a variable $int
       ?>
		
        <?php if($int == 48) :?>
	        <?php // DISPLAY A MESSAGE SAYING THE REPLY IS HIDDEN ?>
	        <?php if(!user_subscribed()):?>
		        <?php //bbp_get_template_part( 'loop', 'search-reply-membersonly'); ?>
		        <div class="hidden-forum-comment">This comment is only visible to subscribers. <a href="/join">Click here to subscribe.</a></div>
	        <?php endif;?>
        <?php else :?>
                <?php bbp_get_template_part( 'loop', 'search-reply'); ?>
        <?php endif ;?>

<?php elseif(get_post_type() == 'forum'): ?>
	<?php bbp_get_template_part( 'loop', 'search-forum'); ?>
<?php elseif(get_post_type() == 'topic'): ?>	
	<?php bbp_get_template_part( 'loop', 'search-topic'); ?>
<?php endif;?>

Hope i’ve pasted that correctly.
48 is the ID of the Members Only Forum.
!user_subscribed() is one of my own functions to check if a user is subscribed to a product with DAP (Digital Access Pass).

If anyone needs more help with this just ask. Be happy to help.