--- a/doc/user_guide.txt	Thu Dec 08 11:17:07 2022 +0100
+++ b/doc/user_guide.txt	Thu Dec 08 11:18:46 2022 +0100
@@ -850,6 +850,20 @@
 If either the name or password is not supplied, they are obtained from
 the command-line.
 
+The ``-u user`` setting does not currently operate like a
+user logging in via the web. The user running roundup-admin
+must have read access to the tracker home directory. As a
+result the user has access to the files and the database
+info contained in config.ini.
+
+Using ``-u user`` sets the actor/user parameter in the
+journal. Changes that are made are attributed to that
+user. The password is ignored if provided. Any existing
+username has full access to the data just like the admin
+user. This is an area for further development so that
+roundup-admin could be used with sudo to provide secure
+command line access to a tracker.
+
 When you initialise a new tracker instance you are prompted for the
 admin password. If you want to initialise a tracker non-interactively
 you can put the initialise command and password on the command