The jAPS 2.0 based applications can be CASified using the jAPS 2.0 Community plugin jpcasclient.
The plugin could be downloaded from sourceforge at this address.
More info about this and other jAPS 2.0 plugins could be found on the jAPS Community web site http://www.japsportal.org/ or on the mailinglists at the URL http://sourceforge.net/projects/japs/support.