It would be great if plexamp can cast music to each network speaker independently. The feature request is already implemented Sonos or DsAudio app.
I would like to see if plexamp is able to cast a song A to a network speaker X, a list of songs to a network speaker Y. This is similar to Sonos or DSaudio app that can selected music to a selected network speaker, thus each network speakers or rooms can have different playing songs simultaneously.