I'm not sure I'm in the right section, but lets try.
I'm building up an heos system, for the moment just two items, one speaker in the bedroom of my child and one in the living room.
My child is just 7Y, so he do not have his own phone or can control the music him self.
What I would like to do is to be able to do is to have different music in the different speakers, we are still talking about one system and one home.
I know this might be like swearing in church, but Tidal who also support Heos, has this opportunity as they use the Heos App and there I can choose speaker that I want and where I would like to stream from. it's not depending on the Tidal App.