Disallow "add to cart" for certain registered users

[sscheidegger]

Hi all

Something I couldn't figure out myself: In my shop everybody can order, also unregistered users. But I have some special Joomla users (i.e. one user used by several people) which I want to prevent from ordering in VM. How could I do this? So far I tried putting that user in a special VM shopper group. But like that I could just hide the price, but not the add to cart button!

Thanks for any hints on how to do this in VM 2.0.x!

Stefan