Can´t use 2 MIDI controllers when in "Multi Record" mode.

[NazRat]

Merge (or advanced routing) is a solution, but the OP is using devices that connect via USB with no 5 pin MIDI capability. If he could use a MIDI interface with the controllers, the Multi Record feature might work with the 'Any' option on track input selection. I have not ever tried that. There are software solutions that allow MIDI to be manipulated in real time which would accomplish the OP's needs.

[Armageddon]

Armageddon, You completely misunderstood my problem.

Not at all; my previous post laid out the two possible multi-MIDI scenarios you're trying to accomplish. The only thing I forgot to mention or add is that you have to set everything up in AudioMIDI Setup, not DP. Once you have your controllers laid out and connected in the GUI exactly as you have them laid out and connected for real, you should be able to run multiple MIDI controllers simultaneously to control one keyboard/module (as I did in the previous post) or have multiple MIDI controllers recording to different MIDI channels on different devices.