Different Expense Types for Travel Authorization

Hello,

Is it possible to have a 2 separate expense lists for different employees? We would like to have one set of expenses specifically set up for our corporate employees and a different set of expenses set for our field employees. The corporate employees will be using the Expense Report modules where the field employees will be using the Travel Authorizations. Is it possible to have one set of expenses show for the expense report and a different list of expenses show for the Travel Authorizations? I am hoping we can separate the two by either: Employee Type (Security Role?) or