Create a room on the nearest jvb based on different ip requests

Now there is a xmpp+jicofo machine with three different regions of jvb (based on pubsub), and then I follow the documentation https://github.com/jitsi/jitsi-videobridge/blob/master/doc/octo.md Configured jvb, now I would like to ask how to create a room in the corresponding jvb area according to different request IP. thank you very much. If you can help me, you can get paid help.