I’m no logical editor pro, but I managed to do the channel filtering by doing the folowing:
Set Function to “Filter” (at the bottom)
Add filter Target: Channel
Condition: Unequal
Parameter 1: 2 (This is the midi channel you would like to receive data from on the specific channel.)
To prevent filtering out note, pitchbend or aftertouch data you could add an extra line with:
Filter Target: Type is
Condition: Equal
Parameter 1: Controller
This way, only controllers will be filtered to specific channels.
Best thing would be to save this in a preset for future use.
On a side note, another nice thing you could do is split out entire note ranges, this way you can divide you mpk octaves to the independent VSTi’s. But maybe that’s a bridge to far at the moment 
Hope this helps you a little.