Funnel provides several custom dimensions out-of-the-box to get you started quickly with Funnel. One frequently used dimension is "Traffic Source". This dimension includes a business logic that is suggested by Funnel with different rules.
Due to Funnel's flexibility, you are able to change these out-of-the-box rules and add your own business logic easily.
This Product Guide explains in 2 minutes how you can quickly change the rules of Traffic Source for, as an example, Google Analytics values.