How To Moderate Just Certain Subscribers
Sometimes you have a trouble maker or two, and you want to monitor all of their email messages before they go to your list. So your list in general can be unmoderated, and just certain people will have their messages come to the list moderators for approval.
Add the email addresses into the input form
From now on, any messages these people post to your discussion group, will come to the list moderators for approval first.
Simply reply to approve their message.