HONG KONG—The website of UK-based human rights group Hong Kong Watch could not be accessed through some networks in the city, stoking concerns of internet censorship in the global financial hub, the organization said. Hong Kong Watch Chief Executive Benedict Rogers, said he was worried the issue could be part of a clampdown under the city’s national security law, which empowers the police to request that service providers “delete” information or “provide assistance” on national security cases. The sweeping security law that the Chinese communist regime imposed on Hong Kong in 2020 punishes what authorities broadly define as subversion, secession, collusion with foreign forces, and terrorism, with up to life in jail. “If this is not just a technical malfunction, and Hongkongers will no longer be able to access our website because of the national security law, then this is a serious blow to internet freedom,” Rogers said in a …