It would be very helpful if resources in a service calendar could be limited to certain staff members. For example, in a dental office we offer dental cleanings each hygienist (staff) uses only one room (resource) and would like to be able to use the GHL calendar to book cleanings. However, currently if we have three hygienists GHL will assign a room to them randomly and cannot tie a staff member to a room. There are other uses where certain equipment exists in two alternatives Device A and Device B and each appointment needs a staff with either A or B, but only some staff are trained in A and others in B.