I'm a developer in a wiki module, We have an alpha version of DFwiki (a new wiki for Moodle) and we have this features, In this wikithere are this kind of privileges an options for teachers.
If you would like to try it, you would download DFWiki from:
http://appserv.lsi.upc.es/palangana/moodle/course/view.php?id=15