controlling track bus with "master" fader

[ReallySlow]

I have 9 pots, 9 Faders and 8 buttons on my keyboard that usually are set up for 8 tracks with the 9th as the main bus.  Is there a way to change the assignment of the bus fader so it is always the assigned bus of the selected track?  Or said another way - If the 1st track outputs to Bus C and the 2nd track outputs to Bus D can I make it so when I select track 1 the 9th fader is assigned to Volume on Bus C but when I select track 2 it now controls volume on Bus D?

[azslow3]

Sorry, but that is not implemented. May be no-one has asked in all these years... Also there was many bugs in inputs/outputs/sends, so some theoretically possible related features was not implementable in practice.