systemd daemon and auid

Hello, I understand that daemons started by systemd have a uid -1. For a specific daemon, I would like to have a different auid to trace what the daemon is doing. By having a distinct auid it would be monitored without specific rules. Is that possible ? Otherwise what would be the best way to monitor a specific daemon ? Regards Philippe Worldline, equensWorldline and Ingenico are registered trademarks and trade names owned by the Worldline Group. This e-mail and any documents attached are confidential and intended solely for the addressee. If you are not the intended recipient of this e-mail, you are not authorized to copy, disclose, use or retain it. Please notify the sender immediately and delete this e-mail (including any attachments) from your systems. As e-mails may be intercepted, amended or lost, they are not secure. Worldline and its subsidiaries therefore cannot accept liability for any errors in their content. Although the Worldline Group endeavours to maintain a virus-free network, we do not warrant that this e-mail is virus-free and do not accept liability for any damages or losses resulting from any transmitted virus if any. The risks are deemed to be accepted by anyone who communicates with Worldline or its subsidiaries by e-mail.