Forward only partial

1. Partial .forwarding of email?

I want to forward only some of my incoming email to a different address.
I get both private and work email to the same address, and want to copy all
email that _does not_ contain "" in the sender's address field.
I still want to get those email to work as well, I want them copied to another
email address.

Is there a way to do this?
Someone suggested that I'd forward my email to a program?
How should I do that?
Any ideas is most appreciated.

/Kent Sjolund

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