Withholding Tax for Botswana

Good day All, Can you please assist with the following. The client has a Supplier that needs to be subjected to WHT on certain goods and services. However, on other goods and services, the same Supplier is not subjected to WHT. Can you setup the same Supplier to be subject to WHT and not subject to WHT in the same Supplier master. I've done some test and this is not possible. Please advise what the best way is for this scenario. Thank you Arletta