I'll start with my goal, and work backwards.

I'd like to control my newly acquired Polaris with a ROLI Seaboard. To take full advantage of its capabilities, I need to send on 6 separate midi channels, and be able to apply expression separately on each voice. 

So simply putting the Polaris in Omni mode is not enough, as say bending a note bends all notes, etc.

Some modern instruments can accommodate MPE, and allow that all with one program. I am going to need 6 copies of the same program, each receiving a voice. 

So let's say I have copies of the same program from A1through A6.  How do I receive midi channels 1-6 on those programs?

The menu talks about sending program information on that channel. Not possible using just a controller, but would be willing to jump through hoops by doing that through a sequencer and then playing on the ROLI. But even then, am unclear. And if I do that, can I save the root program and not have to repeat the process every time?

Hope this makes sense!!!!!