It depends on whether you can map your use case on the MediaWiki approach (namespaces, user groups). There are however Extensions to provide fine tuned access.

It depends on whether you can map your use case on the MediaWiki approach (namespaces, user groups). There are however Extensions to provide fine tuned access. If you look for enterprise wikis, Twiki is another good open source software with focus on features like access control. But I don't like it for its complexity.