Control comment view permission from administration depend on logged in user

As administration I need to be able to set the comment view by options depend on roles and to restrict the permission of change it (edit or readonly) so that when the user belong to that role or group the comment field within the issue page set the defual viewable by option and set its view mode depend on the logged in user.
As an example i have 3 parties with different roles
> first role currently logged in then thier comment is viewable by all and they don't have permission to set it to any other option.
> second role thier comment viewable by the third role only
> third role have the permission to set it to all or any other roles