Customer Billing Withholding/Retention

Hi,

I'm looking for the equivalent customer billing retention and withholding functionality that currently exists in Oracle EBS. I've reviewed and searched the documentation under project contracts, contract billing, receivables and I cannot find where we would be able to specify a percentage of withholding or retention for a specific customer. Ideally, it would be at the contract level as the same customer may have different contracts with different terms.

Billing controls appear to have limits and rules that can be applied, would it be able to handle either a fixed amount withholding or a percentage?

If the functionality has not yet been ported over, how have customers handled this requirement in Cloud?