I have a Sonoff multi rf controller with eight switches but four of the switches duplicate the same ID in sets of two with only the command allon/off separating them, at least initially - the IDs change to unique IDs using the EVxxxx code after 30 minutes to an hour after server restart so I have two triggers set up per action.
But I can tell you that the RFLink integration allows you to define aliases for entities. Partly to mitigate a known behavior to the RFLink hub in which a device is detected with different IDs. This way you can treat different signals as a single device.
On the other hand, I don’t think you can generate 2 RFLink devices with the same ID (if that’s what you mean). In that case you could try using a template, or maybe from the event (setting the fire_event attribute)