Hog4 PC Dual Midi Ins?

I'm head of lights at a dinnershow that has a MTC from CueLab running during the show, and afterwards we have a nightclub with DJ. Now I'd like to give him a MIDI-controller to control the rig, but since we have a MIDI-interface attached for the MTC already I wonder if it's possible to have the timecode come in through one port and what probably will be midi messages come in through ANOTHER port? Two different MIDI-ins, is it possible? Iv been through the idea of a touchscreen, and I'd prefer not to do it that way if its possible to take control via another midi-interface.
One solution could be a midi merger, but most applications nowadays come with midi-over-USB which means im screwed there anyways...
Thoughts?