Lorenzo,
Not currently… you can configure 1 instance of JRun4, and then setup deployments for each of your project, so they will all be deployed to the same server but in different contexts. If this doesn’t fit your needs, can you explain in more detail what it is you want and the advantage of it over what we provide now?
This helps us really get a clear idea of what it is we are missing as well as the ‘approach’ to take with it. Keep in mind that our feature list is user-driven, so if this is something the users need we will address it.