Now you can route a instrument to different instrument tracks, but you cannot route one instrument track to different instruments without using the multi instrument, which has disadvantages because you cannot automate specific things in it.
If you can do it, and I havent figur it out, please tell me, but Im relative sure it is not possible.
As example you can use one instrument track for the carrier and the same for the modulator of an effect or more in the inserts. Now you need to generate more than one instrument track.