No luck. Blocked the addresses floating around and while the URL's are blocked game updates CANNOT be downloaded without connecting to PSN. If I try to update a game I'm prompted to sign in to PSN in order to use network features. To use network features and actually connect to PSN I have to update the system firmware which requires the URL's to be allowed.I really don't think thats possible because unlike the PS3 the PS4 updates are behind the PSN login so you can't just download them like that but I haven't tried the system update block and then download approach so it will be interesting to see what OP makes of it.
Unless someone knows another way? I press the option button while highlighting the game in question and select "Check for updates."