Group Session Limit Across Four SIP Interfaces (Two Groups, Shared Limits)

Can I group four sip-interfaces into two groups and apply separate max session limits to each group?

Example:
Group A + B can use up to 200 sessions in total
Group C + D can use up to 200 sessions in total

I want to ensure:
A can use up to 200 sessions, B can also use up to 200 sessions, but A + B combined must not exceed 200 sessions.
(Same logic applies for C and D.)

I know this setup works fine with just two sip-interfaces, but I have four.