Source
How to utilize current user function with email-formatted user names
ISSUE: The system function CURRENT_USER when used in a security policy may not work as expected if user names are in email format (include embedded @).
<code className=”samp”><em>custom_classifier</em></code>!LIST
Lists each custom classification semantic category system tag with its associated regular expressions for the column name and values in the column, the description, and the privacy category tag.