Delegation of Authority

Is it possible to have a delegation of authority based on a position or individual versus a job title?

Currently, Oracle iProcurement approval assignments are setup in Oracle based on an employees' job title. The issue with this set up is that two or more employees may have the same job title but different job duties, and therefore, different delegation requirements. Procurement approval assignment, which allows an individual to approve a purchase requisition, is setup in Oracle based on an employees' job title with authorization set to the financial DOA as listed on the official DOA list. Therefore, all individuals with the same job title are granted the financial DOA to approve requisitions in Oracle.