access control

I want to use the following action hook for action control.

add_filter('asgarosforum_filter_post_content','forum_content_control')
function forum_content_control($content) {
 global $current_user;
 
 if (current_user_can_for_blog(8, 'lp_read_intermediate')) {
        return $content;
    } else {
                return "Content available to LP students only.";
    }
    
}

right now I can turn on or off content display on a global bases, in all forums. However, I want some forums to be student only, and some to be public. My question, is there a way for me to tell what forum I’m in so I can adjust the access routines. something like

add_filter('asgarosforum_filter_post_content','forum_content_control')
function forum_content_control($content) {
 global $current_user;
 global $forum_id;
 global $category_id;

if ($forum_id == 3 || $forum_id==4) {//do access control on forums 3 and 4

 if (current_user_can_for_blog(8, 'lp_read_intermediate')) {
        return $content;
    } else {
                return "Content available to LP students only.";
    }
    
} else { //its not forum 3 or 4, therefore no access control

return $content;

}