Thanks for your question. Yes, you can connect to two rooms at the same time: Open two copies of FarPlay on your computer and join each to a different session.
Your account can only host one session at a time (so if you connect to two sessions, at least one of the sessions needs to be created by someone else). FarPlay is great for connecting with up to around 8 total participants at a time (5 in one session and 3 in another session, for example).
Thank you,
David Liao