Entire pricing variants based on customer category

Is it possible to have implemented a different price list, based on the user category of the customer? I'd like the default price level to show for regular customers, but it would be great if I could have a different price level for "stores" that want to purchase online at higher quantities/discount and another for "distributors" that purchase at an even high quantity/discount level. I suppose it would be possible to set one customer base at a fixed % discount (stores at 40% off) and another (distributors at 60% off) but our pricing doesn't always end up being even like that as some items have different margins, so based on our costs, we might give volume discounts of 40% on some items while others could be 45% and others 50%, etc.

We currently use the free cart, but this would be a key feature for us to upgrade to the paid business version if it is not already possible in it?

Thank you!