Man pages matching name service_seusers in section 5:

service_seusers.5.en	debian 10 / selinux-utils
service_seusers.5.en	debian 11 / selinux-utils
service_seusers.5.ru	debian 11 / selinux-utils
service_seusers.5.en	debian 12 / selinux-utils
service_seusers.5.ru	debian 12 / selinux-utils