I'm not entirely sure I understand the question, but if you are asking what I think, this might help.
I'm pretty sure you can't select a track from your controller.
Sometimes I will be working with several synths, but only want to play one at a time with my controller.
I'll set the input of each MIDI track to a different channel, and turn on Input Echo for all of them.
I then set the channel at the controller for whichever synth I want to play.
The synths all remain active, but I am selecting which one the controller is communicating with.
Hope that makes sense.