Credit card split between same client

I have a client that has two accounts paying for separate charges. As of now, you can only split charges between two clients. It would be helpful to split between two accounts under the same client. For now, I have credit cards that when booking I must copy transaction description and amount and paste into an excel file to keep track, ignore transaction, submit invoice then create another invoice for the same client and past each charge individually to submit using another bank account.