More than 1 Member Selection from Same Dimension by End User

Summary

Is it possible to design a management report that allows users to select 2 members from the same dimension to filter charts/reports?

Content

We have created a set of about 10 charts and/tables in one management report.  All of these elements are showing the variances between 2 versions (e.g. Budget vs Actuals).  Ideally we'd like our users the ability to select which 2 versions they'd like to compare (examples Prior Year vs Current Year, Half Year Forecast vs Budget).  I know it's possible to drive one of the selections using the "CurrentPOV" function and the other could potentially be driven by a substitution variable but is there any way to allow end users to choose both versions on the fly?