Reporting comments made by candidates

I need to report comments left by the candidates (via Oracle Analytics) who withdrew their application. So far I have tried to filter for the 'Candidate withdrew' Current Status Name and Historical Status Name, and then added the 'Historical Step/Status Comments' field to my report. This helped me to list the comments when candidates were moved to 'Candidate withdrew' step. However these comments can come both from candidates and recruiters. I need to separate the candidate comments from recruiter comments. I have fould another field called 'Self-withdrew from carreer site', however I do not think that this is showing the