Sorry for the late response. Sp what I am getting from your post is that you want to know if it is possible to stream from within your home network without using your Internet allowance and stream on your LAN. If this is correct, I am pleased to inform you that yes, this is possible! If you have the desktop SlingPlayer for your Windows or MAC PC and you view your Slingbox using that SlingPlayer, you will be able to stream on your LAN. If you're viewing through our web site then you can view in the 'POP UP" window and this also allows you to view over you LAN. You can completely disconnect your PC from the Internet when viewing in the pop up window and you will still be able to stream your Slingbox. Below is a link to an article that has some useful information about streaming over your LAN as well.
I hope this helps and please feel free to respond with any further questions that you may have.
Thank you ,
Sling Media Moderation Team