Enable /dev/tcp/host/port redirection

Packages describing “net” as local USE flag

Package “net” Flag Description
app-shells/bash Enable /dev/tcp/host/port redirection
games-engines/scummvm enable cloud support via media-libs/sdl2-net
mail-client/s-nail Enable support for network protocols (POP, IMAP and SMTP). If you only need to send mail with the local Transport Agent, disabling this will get you support for only /usr/sbin/sendmail call.
games-fps/prboom-plus Enable support for network play
dev-libs/poco Classes to write network clients & servers

All packages providing a “net” USE flag (2)