Perjury is a criminal matter. Crimes are charged by the prosecutor for the jurisdiction, sometimes called the district attorney. The prosecutor has great discretion about what to charge and pursue as it requires a commitment of the resources of his office which are always limited; much depends on the difficulty of proof. As a practical matter perjuries of the type you describe rarely get the attention and resources of the prosecutor. On the other hand, what you have described might figure heavily in the civil custody determination. That is where your energies are best directed.
Best wishes for a favorable outcome, and please remember to designate at best answer.
This answer is offered as a public service for general information only and may not be relied upon as legal advice.
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