Hey Gene!
You can actually only ban a user account as a regular LocalWiki admin, but I've just set you as a global LocalWiki admin, which should enable this. The ban process is a bit different for an IP, see the guide over here--
Please make sure your LocalWiki account has a strong & unique password! As a global admin, you can permanently delete revisions (not something that's usually warranted, but occasionally important if there's strong consensus around eg someone posting a social security number, etc). So if someone hacked your account that'd be bad :P
-Philip