Discount rule based on customer site DFF

Summary:

Hi Team,

We have a requirement where we need to create discount rule based on Customer Site DFF, for example: At customer site level we have DFF as Customer Group Type and the Values are A,B,C and D. Now we need to be able to select this DFF in Discount Rule DFF.

If Customer Group Type is A then discount amount is 100

If Customer Group Type is A then discount amount is 50

etc…

There is a document available on how to Discount rule based on customer account DFF but there is no document how to do it based on customer site DFF.