[Logician]

Not tested but should work:

In newthread.php, find
-- cut --
$permissions=getpermissions($forumid);
if (!$permissions[canview] or !$permissions[canpostnew]) {
show_nopermission();
}
-- cut --
after that add

-- cut--
if ($foruminfo[forumid]==6 OR $foruminfo[forumid]==7)
{
$subject="[".$bbuserinfo[userid]."] - *".$subject."*";
}
-- cut---

Replace 6 and 7 with forumids..

Enjoy..

Logician