A feature of Federated Wiki is that there multiple versions of each page. So maybe you like Jon Udell's edit of Identity and Provenance, or maybe you like Frances Bell's. Permalinking provides you a simple way to reference the version you want to link to on Twitter or in an email. Here's how it's done.
Find the version you want. Scroll to the bottom of the page. There's a link there that is the URL of the site (or the domain name portion at least).
Uploaded image
Click that to go to a freestanding version of the page. Or right click and capture the URL for sharing via Twitter, or linking in a blog post.
# See also - Permalink - Github permalink - Permalink a Version