Hmm, OK, maybe @apitiot relaxed the rules on being the same IP address (or possibly the computers are behind a firewall and so they appear to have the same IP!)
Can I just clarify though @Mirthe whether this happens when you press the Run button in Pavlovia dashboard. It isn’t sufficient to be in Pilotting Mode, you also have to push the button labelled Pilot to go to the experiment. (I think this is a confusing configuration to be honest and we need to rethink it)