It does not however make me disagree with the translation used by the author; namely the King James translation of the commandment against bearing false witness. Dont get me wrong there are plenty of problems in the King James.
Yes perjury is lying however it is lying in court when one has spoken an oath (to god) that what one says is to the best of ones knowledge the truth.
It is an important difference.
But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death.Liars here comes from Greek pseudesin.