User access to files on same system as owncloud server, without duplicating them

I run an owncloud server on the same system that I use for everyday tasks. Is it possible to have the desktop client avoid reproducing the owncloud data directory if I want to access it through the file system of the user? This user has root access.

Steps to reproduce
1. Install and run owncloud server
2. Setup a user in OS on server system (as admin)
3. Run desktop client and sync data directory

Expected behaviour
Some way to avoid duplication of the same data files on the local server system.

Actual behaviour
The owncloud data directory for that user is copied to the users home folder, duplicating the data on the local system.

Server configuration
Operating system: GNU Linux 4.4.0 (Ubuntu 16.04 distribution)
Web server: apache 2.4.18
Database: sqlite3
PHP version: 7.0.8
ownCloud version: 9.1.0
Updated from an older ownCloud or fresh install: fresh
Special configuration (external storage, external authentication, reverse proxy, server-side-encryption): No


thats just the job of the sync client: Keeping two repositories (remote and local) in sync. There is no way to avoid this except not using the sync client.

If you don't want to have this behavior you can use plain WebDAV with a command line tool like cadaver and connect to the WebDAV address of ownCloud at