modules/common/networking.nix

{
  networking.hosts = {
    "192.168.0.1" = [ "a1" ];
    "192.168.0.2" = [ "a1d1" ];
    "192.168.0.4" = [ "CodedPi" ];
    "192.168.0.5" = [ "SamuelDesktop" "codedPC" "me" ];
    "192.168.0.6" = [ "a1d2" ];
  };
}