Duplicity can and does restore permissions and owner of your files/folders as they were before the backup. To restore the owner two prerequisites have to be met:
1. The restore command has to be run as root, as only root is allowed to `chown`.
2. A user named the same needs to exist on the target machine.
During the restore process the files and folders will be owned by root, but once it finishes Duplicity will set the owner to reflect the original if the above demands are met.
..ede/duply.net