How to differentiate bank details purpose without using Payment Methods?

Summary:

My client has a requirement to differentiate the purposes of Bank Details entered via Employee Self-Service. Is this possible without enabling Payment Methods?

Content (required):

As per standard functionality an employee can enter multiple bank accounts and payment methods in Employee Self-Service. However, my client is not licensed for Oracle Payroll. I would therefore like to ask whether it is possible to use the Payment Methods functionality without a Payroll license, and if not, if there is another workaround to allow the differentiation of bank details for specific purposes (e.g. Salary, Expenses) such as Flexfields on the Bank Details?