Yes, You can select which IP addresses to black list(block)
These blocked IP addresses will not be able to start a chat session, submit a ticket inquiry or have any other communication with your support staff over the LiveHelpNow platform. They will still have full access to your website.
If you find it necessary to ban a visitor, this can be done in the Operator panel.
If for any reason you banned a visitor by mistake an Administrator can release the ban in Admin Panel > Chat System -> System Setup > Banned IPs.