Multi-user sessions using VNC on Mac

[Jesse Heady]

Is it possible to set up VNC on Mac and allow simultaneous private
sessions for users?  Is this only possible if each VNC user has their
own system login and VNC is run as a system service?  Ultimately we
would like to have our Mac available as a server for developers and
designers to login and test their work remotely as we have a
Windows/Linux development environment but need to test our work under
Mac.

Thank you!

Sincerely,
Jesse