Redmine

Can we have a custom member list field similar to the "Assigned"??
This field should automatically take in values from the member list similar to Assigned Field.
Email functionality maybe incorporated if required. But for now , A custom Member list field is very much required since projects/tickets can have different levels of users monitoring it and whoever is assgined in that field, can search and see if they are assigned to or not.
For eg "Moderator", apart from Assgined, there can be one Moderator who the assgined guys will report to. So any moderator can check if any tickets are assigned to them or not and will know who the assgined people who will report to him.