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Please keep the discussion on the mailing list rather than commenting on the wiki (wiki discussions get unwieldy fast).
Motivation
From JIRA description
Currently the `kafka-acls` command has a `--list` option that can list per resource. In order to look at the ACLs for a particular principal the user needs to iterate through the entire list to figure out what privileges a particular principal has been granted. An option to list the ACL per principal would simplify this process.
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