We need the ability to offer multiple "variable sets" on the product page but only allow the customer to select one of the variables from one set ONLY. For example, see this web page: http://www.comfysacks.com/4-ft-bean-bag.html
Note how the user can select ONE of the options from Microsuede Fabrics but once they do, they CANNOT select an option from Pebble Fabrics. We ned the exact same functionality. We need it working exactly the same way on Shopify.