[exim] localredirect for specifice email addresses

I've figured out how do a localredirect for a specific domain to another
port number (and smtp listener). I cannot piece together what is
required to make this work for specific addresses. Below is what I've
done for the domain level redirect. Anyone out there willing to lend a
hand piecing together what is required for specific addresses?

++++++++++++++++++++++++++++++

localredirect:
# Route to pass domain mail to Domino
driver = manualroute
self = send
domains = mydomain.com
route_list = "mydomain.com localhost byname"
transport = internal_smtp

internal_smtp:
driver = smtp
port = 26

++++++++++++++++++++++++++++++

Many Thanks in advance.