Do you mean this? If not then I don't know.
Well I'm able to see my friends libraries on iPhoto, they make a photo stream album and add my email to it and it shows up on my iPhoto under web within iCloud tap, they can even have it on the web if they check the option for it and it will give you a web address to go to I think thats better then being on the same network cause you can be in another state and still see there photos and comment to it..Is that want you talking about?
This is what I mean: the option to view other libraries within the network.