This could be done with MCTRL. Link here:
http://www.ninstrument.com/?page_id=783
I imagine if you contacted Neil he could make a custom version that could be synced externally with a midi note pulse.
I have a custom version of PR8 that he created for me that does precisely this using MCTRL.
Neil installed great features in that custom version for me, 'next pattern', 'next pattern on last step', and 'immediate reset to step 1'
I imagine he can do the same for Pulsar. I think this would be key in order to not have the separate consoles drift in timing.
By occasionally resetting back to a known step, even if they do drift they can at least be managed.