Hi Dan,

There is no way to pass a group field into the Parameter dialog box using ad hoc groups (groups created by using the paper clip), however, by creating a group via a calculated field, this can be done:

http://kb.tableausoftware.com/articles/knowledgebase/creating-groups-using-calculated-fields

Hope this helps!

-Tracy

Thanks Tracy, that Knowledge Base article was exactly what I needed for a similar issue.