You can set dynamic value generation for your Information Map filters (using Information Map Studio). That's because the information map uses a different method to implement filters than that used for stored process parameter value generation.
However, for your stored processes, dynamic and cascading parameter values are not available "out of the box" with the current version of the Enterprise Intelligence platform. This has been a frequently requested feature for the Enterprise Intelligence Platform -- but since a feature such as this must work consistently on ALL client applications -- the feature is not available yet, unless you take control of your own "front end" to invoke the stored process. This might include custom JSPs or a custom .NET application or a custom HTML or dynamic HTML front end (not only JSPs -- you can write your own front end.)