This should always be set to t for a site (that is, network) license -- the licensing mechanism does not work in any other circumstances. Do not set the variable otherwise, as it overrides any useful diagnostics which may accompany keyfile errors. Not applicable to LispWorks for Linux, Windows, x86/x64 Solaris, FreeBSD or Macintosh.
LispWorks User Guide and Reference Manual - 13 Feb 2015