Hi Pot
I don't know anything about the Bose system but the B2 is capable of feeding different devices with different material. For example, I have had my B2 playing different tracks, simultaneously, via optical cable on my HiFi , and via NAS to two different PCs, and to two different Android Phones. It may have been possible to go further but I ran out of devices.
I suppose it will depend on whether each Bose speaker can operate as a discrete device and can operate independently of the others or not.