Need an identifier to pick Expenses Invoices b 'Validate Payables Invoices' job

Summary:

We have a client requirement to Validate the Invoices coming from Expenses Module (Employee Expenses, Corporate Card Expenses, Cash Advances) and not any other invoice when 'Validate Payables Invoices' job is scheduled.

Since the Employees are One Time supplier there is no way to populate 'Pay Group' or 'Invoice Group' on these invoices. The list is huge and cannot be done manually. (Invoice Date, Entered By parameters are common for Vendor Invoices and other source invoices along with Expenses).

We are struggling to identify a parameter on 'Validate Payables Invoices' job to pick only invoices imported from Expenses Module.