[ZomgStuff]

can_moderate($forumid = 0, $do = '', $userid = -1, $usergroupids = '');

$forumid       int       Specific forum to check. If not set, will check whether the user is a moderator of any forum at all.
$do            string    Specific mod action to check. If not set, will check whether the user is a moderator of the forum specified in $forumid.
$userid        int       User ID to check. If not set, will use $vbulletin->userinfo.
$usergroupids  string    List of group IDs, separate by commas, to which the user belongs. Should be generally left blank.