1. A method for filtering content objects on a per user basis at a gateway node in a content centric networking (CCN) network, where the gateway node has a network interface with a network of a user device originating a CCN interest packet, the CCN network in communication with a content provider and a separate content marking service, the method comprising: receiving the CCN interest packet by the gateway node, the CCN interest packet including a CCN name and a user identity; retrieving at the gateway node content object identified by the CCN name, where the CCN name uniquely identifies the content object within a globally shared namespace within the CCN network, where the content object originated with the content provider; retrieving allowed categories of a user; retrieving categories of the content object determined by the content marking service where categories identify types of content in the content object; checking, by the gateway node whether the allowed categories of the user enable retrieval of the content object based on comparison with the categories of the content object; and forwarding by the gateway node the content object to the user in response to the allowed categories of the user enabling retrieval of the content object for the user.