Jean Allan Moodie, 64, a lawyer in the Office of Foreign Assets Control in the Treasury Department and a resident of the Washington area since 1942, died of septicemia Sunday at George Washington University Hospital. She lived in Falls Church.

Mrs. Moodie came here during World War II and began her federal career as a lawyer in the Office of Price Administration. The following year, she joined Treasury and was assigned to the Office of Foreign Funds Control. She helped draft regulations to block the transfer from this country of assets owned by Germany and other Axis powers.

The Office of Foreign Funds Control later became the Office of Foreign Assets Control During the 1950s and 1960s, Mrs. Moodie helped prepare measures to restrict trade with the People's Republic of China. When the United States resumed diplomatic relations with Peking in the 1970s, she helped dismantle these regulations. She also took part in drafting regulations to restrict trade with North Korea, Cuba and Vietnam and to embargo the importation of chrome from Southern Rhosesia, now Zimbabwe, when Southern Rhodesia was ruled by a white minority government.

Mrs. Moodie was born in Buffalo, N.Y., and graduated from Vassar College in 1938. In 1941, she earned a law degree at the University of Buffalo.

Survivors include her husband, John, of Falls Church; two sons, David, also of Falls Church, and Douglas, Of New York City, and three sisters, Virginia Hayes of Buffalo, Barbara Roberts of Denver, and Ann Corscaden of Houston.

The family suggests that expressions of sympathy be in the form of contributions to the Audubon Naturalist Society, or to the Legal Aid Society.