rsync.net has "subaccounts" which allow you to control side-by-side backup directories using standard UNIX permissions and ownerships. That is, if the default

rsync.net has "subaccounts" which allow you to control side-by-side backup directories using standard UNIX permissions and ownerships. That is, if the default configuration is not exactly what you'd like. Subaccounts even get their own .ssh/authorized_keys file. It's all very unix centered and command-line focused. There's no web interface for features like this.