Confira o 7Taskbar Tweaker .
Uma ferramenta que permite:
- Group/ungroup/show label/hide label per Application ID.
- Reorder items within a tab group (drag’n'drop).
- Close/minimize/etc. multiple windows at once.
- Change Application ID of windows (that is, grouping whatever windows you want). You can open it from the tweaker main window, from its tray menu, or optionally by double/middle clicking the empty space of the taskbar.