Man pages matching name pmsetprocessidentity in section 3:

pmSetProcessIdentity.3.en	debian 10 / libpcp3-dev
pmsetprocessidentity.3.en	debian 10 / libpcp3-dev
pmSetProcessIdentity.3.en	debian 11 / libpcp3-dev
pmSetProcessIdentity.3.en	debian 12 / libpcp3-dev