Man pages matching name proc_pid_net in section 5:

proc_pid_net.5.en	debian 13 / manpages
proc_pid_net.5.de	debian 13 / manpages-de
proc_pid_net.5.fr	debian 13 / manpages-fr
proc_pid_net.5.pl	debian 13 / manpages-pl
proc_pid_net.5.ro	debian 13 / manpages-ro
proc_pid_net.5.ru	debian 13 / manpages-ru