Interesting, but ?? Not sure what this is about.
As far as MIDI is concerned, there is no such thing as a treble or a bass track. A track is just a track. You can define a key, but that's it. You could use a text item and note that a track should be a treble or bass (or alto ?) stave, but if the midi file is imported into software that shows staves then this software will have it's own rules as to how it imports/displays data and it may take no notice of your marking.
Maybe you could clarify what you were hoping to achieve?
Geoff