So what I've done in the past is setup 2 different campaigns, one with just Google enabled and the other with Google and Search Network enabled but with a slightly lower bid. This generally results in the 2nd campaign only being search network traffic, and it usually works fine because generally the search network traffic is a little cheaper anyway.
However I now have a situation where search network traffic is apparently the same price as traffic from Google.com for these particular keywords, because when I bid lower my positions sink and I barely get a trickle of clicks.
Does anyone know of another "trick" in order to separate the Google.com clicks and the Search Network clicks?