The NL Direct Banking extension provides the possibility to work with G-Accounts (Blocked accounts)
Initial setting can be found on the Vendor. You can setup a second Bank Account and the % or fixed Amount which must be calculated from the payment amount. The calculated difference will create a second payment line in the telebanking Proposal for the G-Account.
If this setup is on the vendor card your purchase order/ purchase invoice will be created with this default split. You can change this on the document if needed.
When the payment is executed the payment history contains the information of the G-account entries.