Want to show post from all categories having a particular tag!

Thank you so much for developing such a nice plugin which is a very significant piece of great work to the people like me who takes care many online news portal. The plugin works just awesome, I don’t have any issue. I want to recommend the plugin strongly.

I want to show post from all the categories which has a particular tag. Can you please help me fix the matter so that I can show only those posts across categories having a definite tag?

The page I need help with: [log in to see the link]