[Opserty]

can_moderate() Returns whether or not the given user can perform a specific moderation action in the specified forum

boolean can_moderate ([integer $forumid = 0], [string $do = ''], [integer $userid = -1], [string $usergroupids = ''])

• integer $forumid: Forum ID
• string $do: If you want to check a particular moderation permission, name it here
• integer $userid: User ID
• string $usergroupids: Comma separated list of usergroups to which the user belongs

http://members.vbulletin.com/api/vBulletin/_includes_functions_php.html#functioncan_moderate

So you could do something like.

PHP Code:

if(can_moderate(4, '', 1))
{
    //...
}