Hi @Bluesden 

Thanks for your post!

Sonos isn’t really designed with this purpose in mind, but I believe there is a way to mostly achieve what you want to do.

The thing to do would be to use controller A to set up a system for user A, add services for user A, and once done, turn it all off. Then, use controller B to set up system B, add services for user B, and then turn that off too so you can start with system, controller and services for user C. Once all have been setup, turn them all on. Each controller will only connect to the system they “know”.

The trouble comes when you want communal areas - this would not be an option. Sonos speakers are either part of a system, or they are part of another system - there’s no way to have players show in more than one system, and there is no way to have multiple user accounts/settings on a single system.

With Amazon Alexa and Google Assistant, they only work with one system per account, so you would need separate Sonos accounts for each voice assistant user.

An alternate solution would be to just set up all the speakers on one system. Then, assign a different voice assistant to each user/music account. Alexa could link to one user’s account, Google Assistant to another, and Sonos Voice Control to a third. Please note, however, that Google Assistant will not run on the same speaker as another voice assistant, but Alexa and SVC are happy to run on the same speaker at the same time. For non-voice-activated playback, All 4 Spotify accounts can be added to Sonos, and the correct one chosen by each user. If children are involved, just be sure to demonstrate that if they misuse the system (start playing music in wrong rooms at loud volumes) they will lose their Sonos privileges (you could physically remove their speaker, or only give them guest WiFi access).

I hope this helps.