Board Thread:Support Requests - Getting Started/@comment-15128551-20130811010136/@comment-4018164-20130811014402

Limiting the accessibility in your wiki is not allowed. The idea of wikis is to have information that everyone can access.

You may request protecting your wiki so that unregistered users and new users cannot edit it, but you'd have to have a very good reason for this, like large number of vandals, but they are likely to do that for only a few weeks.

Though, if you want to have a moderated access wiki, you can use another wiki host or create your own wiki website, if you really need to.