Regular expression redirect?

Hello

I have tried to find information about regular expression redirecting but
nothing yet has emerged out...

We are making a drastic reorganisation of our mailing system and I would
need to make a email-address based redirecting as follows

We have a front-end Postfix mailing system and (basically) two backend mail
servers, one for regular mail and another for mailing lists.

Normally taht's not a problem as the address scheme is as follows:

address@domain.net and list-l@lists.domain.net

Only that for historicval reasons some lists are also referred as
list-l@domain.net

Now what I would like to do is to be able to redirect *-l@domain.net to
*-l@lists.domain.net the asterisk meaning the list-specific prefix.

So, any pointers how to do this?

Best regards

Hannu Niemi (<hannu@(remove_this_for_spam)listserv.kuntaliitto .fi)