You'll have to make at least two policy's. So basically name the first Policy "Blocked Connections" or whatever you wish, then after you add 4 links to the "Website Blocking" switch over to "Policy #2" and do the same thing you did for the first one, (add client, etc etc) on the bottom just make sure to add the other connections you didn't add on the first policy. That way you block them all.
Just go to "Access Restrictions" and Enable it, make sure that under "Clients" you go ahead and put either your PS3's MAC address or your PS3 IP address. Of course, under website blocking, put the links you see on the first page.