Is there a way to hide Users? from the Users area?

Hi,
Currently there are quite alot of Extra users in my Users area (most of which are System related for the Appointment + plugin i.e. "Dummy Service Providers" When the site gets populated with real users it is going to be a bit annoying moving between pages trying to sort through them. is there a way to add another category in the same way that currently there is

"All" / "Administrator" / "Subscriber" / "Pending" .... ( And Add 2 more for me to be able to sort them better? e.g. "System Accounts" And "Members")

Thanks

Tom