dynamci filters

Calling all procmail gurus here.  I have searched and can not find any info on how to do this and I'm not sure if
this is something that procmail can handle.

I would like to setup a filter that would catch a subject line that has 2 variations, but change where the
email will be forwarded to depending on this subject it matches.

1. All emails are forwarded to email-address1.

2. Receive email with "Subject: PROBLEM ..." for the first time, forward to email-address1.  Any
consecutive times afterwards I want to forward the email to email-address2.

3. When email with "Subject: RECOVERY..." is received I want the email to go to email-address1 and change
the filter for "Subject: PROBLEM ..." back to forwading to email-address1.

Is this possible with procmail?

-george