username details for reports with Watchgurd firewall

username details for reports with Watchgurd firewall

Hi
 
I am unable to show usernames in my reports.  I am aware that Firewall Analyzer searches for the "user" tag to parse, but in the Watchguard logs, it uses "src_user" instead.
 
Can I configure FA to detect "src_user" as the user tag instead?
 

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