Chatroom is a WordPress chatroom, group chat plugin. This plugin will work in any user based wordpress blog, forum, community, directory, ecommerce or buddypress website. This plugin uses buddypress for group chat and all users can chat in a chatroom and can private chat with each other also. You can create buddypress group and control members.
Demo: https://codecanyon.net/item/wordpress-chat-room-group-chat-plugin/14052818
source http://www.codelist.cc/plugins/243366-wordpress-chat-room-v107-group-chat-plugin.html