ApprovalMax allows restricting Requesters in terms of what data they can see and use when creating Bills. For example, access rights for Bills creation can be configured so that a particular Requester is allowed to select only particular Vendors or a particular Account.
This is how you restrict a Requester
Click on the Matrix icon
in the first step of the workflow to open the Requester matrix:
Add the Requesters who will be allowed to create Bills.
Specify the restriction criteria, such as: Vendor, Account, Expense Category, Department, Class, Location, Item.
Click on DONE and save your changes: