to configure variant group with respect to order types

Hi All,

how can I configure a variant group with respect to order types as well as users.

what I want is that only 3 users can make changes in pricing for 2 specific order types ( for example take one standard order and other rush order type)

this variant group already has the list of all the users which have authorization for the change but how to restrict these users to only these 2 sales order types.

Regards

Saurabh