Hi Marcel,
vROps Chargeback for vCD will be our go-forward strategy for customer-facing showback/chargeback billing. While the solution is still evolving, this provides organization/orgVDC billing policies based on your requirements and also available via the API.
However, this is not based on the provider VDC (pVDC) - it will be all based on the organization VDC. Hope this helps.
-Daniel