Maybe this will do it. In includes/functions_online.php find line 128
PHP Code:
if (($wol_thread["$threadid"]['isdeleted'] OR !$wol_thread["$threadid"]['visible']) AND !can_moderate($forumid))
and change it to
PHP Code:
if (($wol_thread["$threadid"]['isdeleted'] OR !$wol_thread["$threadid"]['visible'] OR $forumid == '50') AND !can_moderate($forumid))
Where you see '50' put in your actual forumid. I'm not sure there should be quotes around it so try without quotes if it doesn't work.
I'll be away until early next week, I'll check back then.
EDIT: If this is a category I'm not sure the category forumid will work (I'm not sure this will work at all actually). If you have several forums put in
PHP Code:
OR in_array($forumid, explode(',', '51,52,53'))
instead of
PHP Code:
OR $forumid == '50'