This is the law for the city (Portland) and the county (Multnomah).
I excerpted the relevant identity issues.
http://www.portlandonline.com/auditor/index.cfm?c=28187 23.01.020 Intent. -
(Amended by Ordinance No. 175158, effective January 15, 2001.) The City Council finds that discrimination on the basis of sexual orientation, gender identity and source of income exists in the City of Portland and that state law does not clearly prohibit such discrimination.
It is the intent of the Council, in the exercise of its powers for the protection of the public health, safety, and general welfare and for the maintenance of peace and good government, that every individual shall have an equal opportunity to participate fully in the life of the City and that discriminatory barriers to equal participation in employment, housing, and public accommodations be removed
C. "Gender Identity" – a person's actual or perceived sex, including a person's identity, appearance, expression or behavior, whether or not that identity, appearance, expression or behavior is different from that traditionally associated with the person's sex at birth.
23.01.040 Exceptions. - \
(Amended by Ordinance No. 175158, effective January 15, 2001.)
A. The prohibitions in this Chapter against discriminating on the basis of sexual orientation and gender identity do not apply:
1. To the leasing or renting of a room or rooms within an individual living unit which is occupied by the lessor as his or her residence;
2. To dwellings with not more than two individual living units where one of the units is owner occupied;
3. To space within a church, temple, synagogue, religious school, or other facility used primarily for religious purposes.
C. The prohibitions in this Chapter against discriminating on the basis of gender identity do not prohibit:
1. Health or athletic clubs or other entities that operate gender-specific facilities involving public nudity such as showers and locker rooms, from requiring an individual to document their gender or transitional status. Such documentation can include but is not limited to a court order, letter from a physician, birth certificate, passport, or driver's license.
2. Otherwise valid employer dress codes or policies, so long as the employer provides, on a case-by-case basis, for reasonable accommodation based on the health and safety needs of persons protected on the basis of gender identity.
3. The above exceptions do not excuse a failure to provide reasonable and appropriate accommodations permitting all persons access to restrooms consistent with their expressed gender.
23.01.060 Discrimination in Selling, Renting, or Leasing Real Property Prohibited.
(Amended by Ordinance No. 175158, effective January 15, 2001.)
B. In addition, it shall be unlawful to discriminate in selling, renting, or leasing real property on the basis of an individual's sexual orientation, gender identity, source of income, or age if the individual is 18 years of age or older except as is excluded in ORS 659.033 subsection 6 (a) and (b), by committing against any such individual any of the acts already made unlawful under ORS 659.033 when committed against the categories of persons listed therein.
23.01.070 Discrimination in Places of Public Accommodation Prohibited -
B. In addition, it shall be unlawful in public accommodations to discriminate on the basis of an individual's sexual orientation, gender identity, source of income or familial status, by committing against any such individual any of the acts already made unlawful under ORS 659.037 or ORS 30.670 to 30.685 when committed against the categories of persons listed therein.