No, but several press reports have claimed she was cuffed.
Such as the MSNBC one here:
"U.S. Capitol Police took Sheehan away in handcuffs and charged her with unlawful conduct, a misdemeanor, when she showed up to President Bush’s address Tuesday night wearing a shirt that read, “2245 Dead. How many more?” — a reference to the number of soldiers killed in Iraq."
Cindy Sheehan’s Charges Will Be Dropped | Sweetness & Light
http://www.sweetness-light.com/archive/cindy-sheehans-charges-will-be-dropped/
But Mother Sheehan herself neglected to mention being cuffed, even though she talked about every other detail, such as being fingerprinted:
Cindy Sheehan Claims Cops Roughed Her Up | Sweetness & Light
http://www.sweetness-light.com/archive/cindy-sheehan-claims-cops-roughed-her-up/
And I haven't seen any photos. So I doubt that it actually happened. But I guess it might have.
I'm thinking it didn't happen