Travel Authorization for Purchase Order

Organization Name (Required - If you are an Oracle Partner, please provide the organization you are logging the idea on behalf of):

Flemish Government

Description (Required):

Some Travel Expenses requested through the Expense Module will be paid directly to the supplier using a purchase order.
Is there a way to differentiate this so that the budget does not affect the Expense Module but the budget in the Purchasing module?

Use Case and Business Need (Required):

We need to differentiate costs of the travel authorization to another budget in the Procurement Module and not in the Expenses Module

Enhancement Request / Service Request: