Different categories displayed in menu bar and sidebar menu

Hi,

firstly, thanks for a great theme. I just came across this and it's inherent simplicity yet easily configurable nature is just what I needed, so I made a donation

There is one thing though I was trying to do - I wanted to have different categories displayed in the cat menu bar than are in the sdebar widget. the menu bar is easy as I can do that through the ATO panel.

When I place a category widget in the sidebar I don't think there are options to only display certain categories as there are in the menu bar and I couldn't find it in the code anywhere.

Is this possible to do?

Thanks, Bob