The current lawsuit, filed by plaintiffs Li Zhi, Zheng Cunzhu and Guo Quan in the U.S. District Court of Northern California, seeks damages for their suffering at the hands of Chinese officials after Yahoo and Yahoo Hong Kong allegedly provided access to e-mails, e-mail records, user identification information and other data to authorities in China...Yahoo did not immediately respond to requests for comment. Specifically, Li is suing over his torture and imprisonment by Chinese officials after his work for the China Democracy Party — a banned political group — was revealed in information Yahoo provided officials about his Internet activity...Zheng is now allegedly unable to return to China because he fears prosecution, according to the lawsuit...Guo lost his job as an associate professor at Nanjing Normal University after his Internet identity was revealed to Chinese authorities by Yahoo, the lawsuit alleged...The group has filed suit in the U.S. under the Alien Tort Claims Act of 1789.