OK I found: http://www.squeaksource.com/adl which redirected me to:
Search on SqueakSource for "Pier ACL" and look for mails in the
mailing list archive (likely dating back to 2006 or more).
> Hi,
>
> Philippe implemented a capabilities (ACL) based security model.
> Can you point me at the implementation?
> Thanks
> Nick
>
--
Lukas Renggli
www.lukas-renggli.ch
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