[Exim] IP based filtering for aliases?

Morning folks
Was just wondering . . . .
I've got an alias setup which distributes to various people in the
organisation, lets say for example "lusers@???". I'd like
to be able to restrict mail coming into this alias to only allow
incoming mail from our internal IP address range.

As it is an alias and not a real user, I can't see a way to use the
normal filtering to do this other than to create it as a user and use a
.forward file to do the distribution, but this is not a very elegant
solution at all. I can also not see a way to do filtering in a .forward
file based on originating IP address.

Is there a way to do this in an acl?

Later
Konrad


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