[exim] Router conditional on source IP

In Exim 4.52, is there any way to have different routers used
depending on whether the mail came from localhost or some remote IP?

I need to make sure that system reports and such generated locally on
a host are sent out for alias expansion and not delivered locally,
while mail coming in from the network that has already undergone
filtering and alias expansion is delivered normally.

Thanks,

- J<