Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
I found only global moderator can ban user globally.
I don't really understand what you're asking. Yes, category moderators can't ban users globally AFAIK. This is expected behavior. Do you want them to be able to ban a user from a specific category?
yes, ban a user from a specific category or thread.
