Lock Posts: Wiki contributors are able to edit a locked post.

I'm using both WPMUDev plugins "Lock Posts" and "Wiki". While adding or editing a wiki, I am able as a Network Admin to LOCK a post. Yet, a Wiki user is still able to edit the wiki post.

I am using Capabilities Manager to create a role. Is there a capability I need to define to lock him out like a contributor (or any other role)?