What is the right attribute in ProjectTimeCardApproval for Person Types (in User and Roles)

Summary:

What is the right attribute in ProjectTimeCardApproval for Person Types (in User and Roles)

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Hi,

In our current situation all the time cards must be approved by the supervisor. There is no difference between a timecard of an external or an internal employee. We would like to enable AutoApprove for the timecards of our internal employees. Timecards of external employees still has to be approved by the supervisor.

We are now looking for the correct attributes for which can make the differentiation between these to Person Types. See attached screenshots for the examples. However, we can't find the right one. Which attribute must we select to create an AutoApprove based on the Person Type in User and Roles?