Azuga will identify all the occupants in your vehicle provided that each of them carries a beacon. The OBD device detects all the beacons and reports it to Azuga. But it will not be able to determine who is behind the wheel. 

Occupant recognition works best when there is only one driver-beacon pair present in the vehicle.

When there is only one occupant in the vehicle, beacon gets paired in the very first ping from the device.