Thank you very much for the message.
You are able to specify the different discounts for different customers, using the (customer groups)(
http://kb.ecwid.com/w/page/70372088/Customer%20Groups) feature. Such way wouldn’t change the price of product itself. The customer will receive the discount on the checkout step. Unfortunately, it’s not possible to display the different prices for the different customer groups in your product browser, at this moment.
As a workaround, I can suggest you the following.
You can create two store fronts, using your single Ecwid account. One storefront for your customer group, and second for the rest of users. You will need to have two sets of products: one with regular prices, the other one - with the discounted prices. Then you can install the second Ecwid storefront (right on your site just on another page, or on another website), and specify default category for each storefront. Please check this article for details on this solution:
http://kb.ecwid.com/w/page/27229589/...lesaleproducts
Please, do not hesitate to ask any questions. We are happy to help you.