Hi @vinodporwal,
Thank you for your interest in the Agora Video for WordPress plugin. Currently the plugin’s communication mode does not place any restrictions on the number of users, though this feature is on the roadmap for the next major release.
If you wish to implement this feature immediately, then you can use live broadcast mode to specify the users are broadcasters.
Alternatively if you are technical then you can edit the plugin to remove users if 2 users are already in the channel. Specifically modify the listener for the ‘stream-added’ event. and if the callback is called more than once within a 2 second period it means there are two users already in the channel so force the 3rd client to leave.