Things I Learned About Facebook
This probably applies equally to Flickr, but have not tested.
In the process of trying to resolve an issue with Aperture crashing while attempting to publish to Facebook, I tested with using the same FB accounts on more than one Mac. These test were important in that they proved 1) that Facebook Publisher was working on another Mac and another OSX, and 2) even using library clones, FB albums you add from one library clone and Mac, will not be fully functional insofar as still being connected with the originals when you then open another clone of the same library from another Mac. Whie the newly published album will appear on the second Mac in the other library clone, the images are those downloaded from Facebook, and not those from the originals of the originating Project. This is not surprising, but I needed to confirm it.
It can work in full expectation if you reverse clone from the Library associated with one Mac to the the Library associated with a second Mac, or if you move an actual Library that is on an external drive between the two Macs, assuming you can get the permissions done right.
See:
https://discussions.apple.com/thread/4883929?tstart=0
Ernie