I don't think it's possible, though I certainly could be wrong.
I doubt a slider will work well, but here's how you'd probably do it. Let's say you only have a single dimension, and there's room for 20 values of this dimension in your scroll area. You set up a vertical multi-value slider for that field with a height of 20 values. Now your two tables show ONLY those 20 values, so won't have scroll bars of their own. Move the slider up and down, and your two tables will "scroll" up and down, and remain in sync.
However, any selections that are incompatible with the 20 values in the slider will wipe out your slider bar, I believe. And the user can manually select 5 values or 50 values using the slider rather than just using it to scroll. So it doesn't seem very robust. It's also not clear that the slider is connected to scrolling the tables the way a scroll bar is clear.