Multilogging

Anyone have a suggestion for sending log stuff to multiple files?
I would like something like this:

LOGFILE=$MAILDIR/global.log
LOGABSTRACT=yes
LOG=`formail -X To:`"
"

:0
* special case
{
  DATE=`date +%m-%d`
  ALSOLOG=$MAILDIR/special-$DATE.log

  # special stuff
}

I know I can process the log with perl to create special logs, but
I would rather have it done automatically. (Particularly since not
everything for special case has a "To:" line, so spliting stuff out
becomes hairy.) If logs to something like `tee -a foo | cat >> bar`
work that might help, but that would not allow easy file locking.
(Does procmail lock the logfile? If not, why?)

Elijah
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