GoAffPro provides you with the option to block commission for affiliates when the click on their referral link originates from a particular domain or page.
To block commission for affiliates from clicks originating from particular domains or pages, go to the Advanced section in the Settings tab of the GoAffPro admin panel.
Settings > Advanced
Here, go to the Blocked IP/Origins section.
Blocked IP/Origins
Now, enter the URL of the domains or pages from whom you want to block the commission.