This is just an object that uses the "Taskbar" object type(no additional abilities). The Grouping I was referring to was like the windows Taskbar does. It can group multiple programs of the same type. In RC it is called Automatic grouping(under the "Taskbar" object Settings). It would be displayed as Windows Explorer(2) with a submenu showing all the programs that match that criteria.
I have seen this in several different DX themes, so I assumed it was a StarDock Object. The objects are also available when creating a new desktop object from scratch(just checked that). If these are not stardock objects, then I apologize.
Thanks