Please login (and create login in AF if not have one) and add your request for Organization here. The organization name should match a live domain name ownership of which could be confirmed via public DNS contact. This contact should confirm your request in order to give your login the moderation rights.
If you hosting your project on 3rd party site like BitBucket or Github and do have own domain this will be your "Organization" level. Most likely it is already registered.
Append your domain name in the end of this page.