Ability to assign dummy services providers to more than one user

I am setting up Appointments to use with 2 people, both have 2 different services they offer on different days. I can setup dummy service providers for each additional service. The problem I run into is that I want dummy service provider 1 to be assigned to service provider 1 and dummy service provider 2 to be assigned to service provider 2.

Can I do this with any of your hooks?

Even if I can make it so the all dummy service providers emails go to both service providers at the same time that would be acceptable.

Any help pointing me in the right direction is greatly appreciated.
Ellen