The notation program outputs everything on a chosen port, but all 16 channels. I found out how to divert them to different ports with MidiOx.
So the realtime playback falls in his place.

One thing left. Though I can do it with the midi plugin TCMfxVelocityToCC in Sonar, I am looking for a similar plug to set before the midistream goes to MidiOx(possibly with MapleTools) to convert all old-fashioned velocities to ModWheel.