More correctly, ping protocol specifies a device ID system (i.e. the protocol includes fields that such a system would theoretically require to function). As @tony-white mentioned, the potential filtering functionality of those fields isn’t implemented at moment, on either side (in the firmware, or in our interfacing libraries/software).
I’ve just raised an issue to track this, although given our current development projects, combined with the fact that most users don’t need the feature, it seems unlikely we’ll be able to prioritise it in the near future - sorry!
Once you’re able to communicate with multiple sonars, the main usage concern is around interference between them, which there’s some extra discussion about in this thread 