Indeed this is not possible currently. However, there is an existing feature request at our issue tracker regarding to add the 'Assignee' field which can help to know who logged the time https://jira.atlassian.com/browse/GHS-5976.
Please free to vote for it :).
Hi team, I’m Avinoam, a product manager on Confluence Cloud, and today I’m really excited to let the Community know that all customers can now try out the new editing experience and see some of the ...
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