@Anonymous, You are not required to identify yourself when submitting a DoD Hotline complaint.
However, I would suggest you read the Reprisal Complaint information (http://www.dodig.mil/hotline/reprisalcomplaint.html) You also have the ability to call the Hotline and talk to a trained, professional, and courteous investigator whose purpose is to answer your Hotline related questions and to provide guidance on submitting a complaint.