[SA-exim] Can spamd process per-user user_prefs?

[Mark Zbikowski]

Using sa-exim, is it possible to make spamd process individual
$HOME/.spamassassin/user_prefs?  I haven't been able to figure it out.

On Debian, spamd always seems to use "Debian-exim" as the user, for
example:

  Feb  4 10:34:33 mx2 spamd[14677]: spamd: setuid to Debian-exim
succeeded
  Feb  4 10:34:33 mx2 spamd[14677]: info: user has changed
  Feb  4 10:34:33 mx2 spamd[14677]: config: using
"/var/spool/exim4/.spamassassin" for user state dir

So it always process the same user state dir.  I assume this is because
sa-exim always passes "Debian-exim" as the uid.

I would like spamd to process per-user configuration files.

My versions:
exim4:
  Installed: 4.50-8sarge2
exim4-daemon-heavy:
  Installed: 4.63-12
spamassassin:
  Installed: 3.1.7-1

Any thoughts?

Mark Z