Hey sdv,
Yes, it is possible. You just need to set your nord 2x.
From Nord 2x manual:
SLOT MIDI CHANNEL
To set the MIDI Channel that a certain Slot receives and transmits on, proceed as follows:
1. Hold down SHIFT and press “MIDI CH”.
2. The DISPLAY shows the MIDI Channel for the active Slot.
3. Select the Slot you want to make settings for. The Slot’s LED flashes.
4. Use the UP/DOWN buttons to set the MIDI Channel. If you don’t want the slot to respond to or
send MIDI, set it to ‘oFF’.
Set also your arturia via "Midi Control Center". For example you will send on to "Sequencer 1" from arturia on channel 1 and you will set "Slot A" on nord 2x to receive midi on channel 1. Do this also for "Sequencer 2" - just set for example channel 2.
Hope this is clear