Hi Dan,
What are you looking to do with your applications? The EMS does not have the concept of "sandboxed" applications like you may find with Adobe Media Server. If you are setting up a service, where you want to have different customers/users with segregated stats and streams, you can setup multiple configurations of the EvoStream Media Server on the same computer. You can run many instances of the EMS on a given computer with a single license.
Bryan