Restricting Number of Users for Tenants

Hi All

Is it possible to restrict the number of users a Tenant can add, under multi-tenancy in Alfresco 5.0.d Community edition?

I.e. imagine this scenario:
- A company has separate tenants for 2 departments.
- Department A is permitted to have a maximum of 10 users. The account: admin@department-A can login and create a maximum of 10 users.
- Department B is permitted to have a maximum of 15 users. The account: admin@department-B can login and create a maximum of 15 users.

Is this somehow configurable? I understand by default there is no restriction on the number of users.

Thanks
Vipul