Hope this might help (USA only):
What You Should Know About EEOC and the Enforcement Protections for LGBT Workers
https://www.eeoc.gov/eeoc/newsroom/wysk/enforcement_protections_lgbt_workers.cfmOverview
EEOC interprets and enforces Title VII's prohibition of sex discrimination as forbidding any employment discrimination based on gender identity or sexual orientation.
These protections apply regardless of any contrary state or local laws.Through investigation, conciliation, and litigation of charges by individuals against private sector employers, as well as hearings and appeals for federal sector workers, the Commission has taken the position that existing sex discrimination provisions in Title VII protect lesbian, gay, bisexual, and transgender (LGBT) applicants and employees against employment bias. The Commission has obtained approximately $6.4 million in monetary relief for individuals, as well as numerous employer policy changes, in voluntary resolutions of LGBT discrimination charges under Title VII since data collection began in 2013. A growing number of court decisions have endorsed the Commission's interpretation of Title VII.
The information provided below highlights what you should know about EEOC's outreach and enforcement in this area.
Examples of LGBT-Related Sex Discrimination Claims
Some examples of LGBT-related claims that EEOC views as unlawful sex discrimination include:
-Failing to hire an applicant because she is a transgender woman.
-Firing an employee because he is planning or has made a gender transition.
-Denying an employee equal access to a common restroom corresponding to the employee's gender identity.
-Harassing an employee because of a gender transition, such as by intentionally and persistently failing to use the name and gender pronoun that correspond to the gender identity with which the employee identifies, and which the employee has communicated to management and employees.
-Denying an employee a promotion because he is gay or straight.
-Discriminating in terms, conditions, or privileges of employment, such as providing a lower salary to an employee because of sexual orientation, or denying spousal health insurance benefits to a female employee because her legal spouse is a woman, while providing spousal health insurance to a male employee whose legal spouse is a woman.
-Harassing an employee because of his or her sexual orientation, for example, by derogatory terms, sexually oriented comments, or disparaging remarks for associating with a person of the same or opposite sex.
-Discriminating against or harassing an employee because of his or her sexual orientation or gender identity, in combination with another unlawful reason, for example, on the basis of transgender status and race, or sexual orientation and disability.
See How to File a Charge of Employment Discrimination for information about filing a Title VII charge of sex discrimination in employment related to gender identity or sexual orientation bias. There is a different complaint process for federal employees.