For setting up the commission for Individual affiliates. You need to upgrade your plan with professional version, where you will get this feature to customize commission individually.
Instruction to setup the commission Individually.
1. Login to the affiliate app and click on the affiliates listing.
2. Select the affiliate for custom setup the commission.
3. Click “Set manual commission”.
4. Enable manual commission option and Insert the commission on this three levels and click “Set Commission” button.