To the best of my knowledge, No.
But, A great many sites treat a visiter differnt depending on what Geospatial area their IP address block is found in.
Google for example know what country you are in and redirects you as needed. When sitting in a Paris McDonalds with WiFi recently, Typing
www.google.com took me instead to
www.google.fr.
It is entirely possible that using the IP address block to determine your country, a site feeds you different content.
However, that is the action of the site owner, not the government.
A web page is contained on a server owned by someone, and they have the power to display or not display content, including search results. To the best of my knowledge, no search engine has ever proffessed to being nuetral in the manner of not editing results.