UWL WebDynpro as paramater

We have an application where we have 1 workflow task in de UWL which we want to be used for 7 WebDynpro applications.

In the workflow, I can determine the correct webdynpro application.

Is it possible to pass the application as a paramater? So the setting "APPLICATION" in SWFVISU with the type WebDynpro ABAP?

Or should I use an iView and let the method call the URL? And if that is the solution: how can I pass a parameter to the iView? Using DYNPARAM?