How to enable this kind of requirement in ORC audit policy

Hi, We have a requirement that wants to have an audit report for recruiting and candidates.

Requirement below.

Ability to audit all recruitment activities, including activities performed by DTA users. The audit should capture who created a record or changed the information on file.

I believe that Created By and Last Updated by will resolve this requirement. However when we checked the audit policy for recruiting, there's no attribute for this fields Created_By and Last_Updated_By. We need help on this.