Symptoms
How to create persistent filters on the Worklist Web Part.
Diagnoses
Possible to create your own custom Worklist Form and display on SharePoint via the K2 Form Viewer Web Part
Resolution
K2 Community Guide: http://community.k2.com/t5/K2-blackpearl/Appit-K2-for-SharePoint-Customized-Worklist-web-part-with/ta-p/90705
Worklist Control Documentation: http://help.k2.com/onlinehelp/k2forsharepoint/UserGuide/current/default.htm_Worklist_Control.html