What does the insidecorporatenetwork claim mean in ADFS 3.0?

I was searching around to find an answer how the the new claim type insidecorporatenetwork  in ADFS 3.0 (Windows Server 2012 R2) would work and I was looking to find somewhere a configuration page to add all the internal networks so that ADFS knows them. Wrong all way as I found out ADFS is just checking if the authentication request coming in through a WAP server or directly.
Through WAP it is considered as external and insidecorporatenetwork is set to false and if it came directly it is considered as request from internal and insidecorporatenetwork is set to true.

Because I did not got that many hits on Bing I thought it would be good having this in my blog as well. See also

http://blogs.msdn.com/b/ramical/archive/2014/01/30/under-the-hood-tour-on-multi-factor-authentication-in-ad-fs-part-1-policy.aspx

https://technet.microsoft.com/en-us/library/dn592182.aspx#build