This question has a vague connotation. Do you mean that you want to review an IELTS Examiner’s past performance, including the grade they award? If this is the case, no one, not even Examiners, are permitted to read such a document.
Another question is: Why would you want to know? IELTS Examiners are frequently watched to ensure they are marking consistently and in accordance with standards. The IELTS Examining System is highly standardised across all of its centres worldwide.