Hello,
Thanks for your post.
Unfortunately, there are no dedicated channels to accomplish this at this time, but if you load two instances of MODO Bass you will be able to send just the DI and just the AMP signal to these different channels with a slight edit to the same preset.
Another option would be to record the output of MODO Bass to two new tracks. When doing so, record one using just the DI signal, then repeating this process for the other channel using just the AMP signal.
I will be sure to pass this interest to the team as a feature request as this does sound like it could allow for some cool routing schemes
Hope this helps!