How to include products that benefit a charity?

I am using this great plugin to show a charity’s ebay products on its website.

It shows all the charity’s products fine. But there are other ebay users who, when listing their own products, have named this charity as benefiting from their sales (i.e., the Ebay for Charity scheme).

When you click on a charity’s ebay page, you see *all* products that benefit the charity – i.e., those sold by the charity themselves and those products sold by others.

Would you be able to update the plugin with a setting that will allow me to control whether the products sold by others are also displayed?