VLAN control on all ethernet ports

As a network engineer, it would be terribly useful to be able to control the untagged VLAN on every ethernet port (AP, SM, BH, BHS, and CMM).
For instance, I have a BH20 connecting a customer and I’d like all that customer’s traffic to be put over a VLAN from my router, but this is not possible with the current generation of software for the BH20.
Currently the only way to achieve this is to put the customer on an SM, which is acceptable in this instance as the customer is requiring more bandwidth than an SM can allow.