Finding lists a user is subscribed to

[Netmanager <netmanager@xxxxxxxxx>]

Hello all,

Is there a way to query the PO listserve for all the lists a 
particular user is subscribed to?  I don't see that as an option in 
the cmdutils.  How does Apple, for instance, allow you to put in your 
email address into a web form and dynamically tell you on one screen 
which lists you are subscribed to?  That is what I'd like to do. 
Thank you.

Mark
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