Can you setup a rule that will allow a user to see a specific field within a product content. For example, when not logged in or you do not have specific access, you see the "add to cart" button. When you are a member and are granted access the add to cart button disappears and gets replaced with a "Download" button.

my goal is to have two ways to sell a digital product, the individual product sale using the "add to cart" function and the normal functioning commerce cart setup, and also a direct download when logged into a specific user. If i cant do both i will scrap one idea, but it would be nice to offer both ways for my customers to choose.

thanks!