Hi Leacy77,
In Qld, workplace harassment is defined by reference to the
Prevention of Workplace Harassment Code of Practice under the
Work Health and Safety Act 2011 (Qld). It includes as examples of workplace harassment things like "repeated threats of dismissal and persistent unjustified criticism or complaints.
Obviously if your boss was ultimately to fire you based on fabricated information, then you may also have grounds for an unfair dismissal claim.
If you feel you are being subjected to workplace harassment you should check out your employer's policy for dealing with these types of situations. It will usually set out a procedure for making an internal complaint and steps to try to resolve the issue through mediation with the persons involved.
If you are unable to solve the problem internally, (assuming you are not employed in the public sector or local government), you may be eligible to apply to the Fair Work Commission for a decision on bullying issues or unfair dismissal. More information can be obtained here:
https://www.fwc.gov.au/resolving-issues-disputes-and-dismissals/what-the-commission-does.