Membership: Multiple Levels per Protected File. Is this possible?

I have four different membership levels. We'll simplify by referring to these as 1, 2, 3, and 4. Two of these levels (3 and 4) provide access to content from levels 1 and 2. I'd like to be able to setup my downloadable content so that I can set multiple levels to access downloads. Is this possible? Currently when I edit the uploaded media I can only select one subscription while I'd like to be able to set a minimum of two.