[winswitch] Xpra start applications as a new session

[svhb at telenet.be]

Hello, 

I want to use xpra to serve an application from a server to some clients, but everyone has to see a newly started up version of the application. The application is a special calculator for material properties, and to prevent updates on every single system, using Xpra to show the application in a browser can be a perfect solution. 
However, if I try to login with a second browser, the first login exits... I need multiple instances, if possible spawned right after connecting. 

Are there some settings/configuration I can do the realize this? 

Thanks in a advance, 

Stefaan.