Update:

I finally figured out how to activate sustain pedal for lower keyboard only:
On V-Console 'Voice Set 2' page, press the "Sustain" controller button to activate sustain.
On V-Console 'Controller' page, press the 'Sustain' button so it turns green, then press the sustain pedal of the lower keyboard, the laptop/PC will give out a confirmation ring sound and the Sustain button returns to its previous color, then click the check mark on 'Link Exp.'. to memorize the setting.

Now I can play, within V-Console software, sustained piano notes on the lower keyboard, while the notes on the upper keyboard is not sustained. I will have to accept this compromise for now until John Beesley provides a solution/instruction for activation of separate sustain pedals for their corresponding keyboards.

Thanks,
Paul