I'm a bit unsure of your requirements, but you should be able to do this via a filter i.e.
I don't think its going to be this easy though, and I think this might have something to do with how you have loaded the data into Tableau. Appreciate if you could upload a sample dataset, or mock up something using superstore data.
Thanks for getting back to me. Sorry I can't post anything, but i think I can explain better. So picture a bar chart showing sales for both lemonade stands (each one with a completely serperate data source). If I want the part chart to show sales just for one of the other at my option, I need a quick filter that would allow me to choose "All" "Main street" or "Broad Street," with these selections filtering out the data source I don't want. Does that make sense?