I'm trying to host an application, but allow the customer to use their own sub domain so that it does not confuse their own customers.

So for example, by application would run on app.mydomain.com, but my customer would access it via their own subdomain (app.somedomain.com and/or app.anotherdomain.com).

Is this even possible?

(Possibly relevant information: my application is hosted on media temple and uses Apache)

Thanks!