Can you use pitch bend/aftertouch on both layers separately via MIDI?

If you have two different patches set up on two separate MIDI channels, can you use pitch bend/aftertouch on both patches if you're addressing them via MIDI?

Sequential support said: "To achieve this, you would need two sets of wheels and an additional keybed since there's just one set of physical controls." But, they never mentioned how the instrument would react via MIDI.