The Justice Department says an Oregon woman can’t use bankruptcy because she works for a staffing agency that recruits employees for the cannabis industry, part of a broader department policy imposing the federal pot ban on individuals whose income is tied to commercial marijuana.

The U.S. trustee, a Justice Department bankruptcy monitor, said in papers filed in the U.S. Bankruptcy Court in Portland that chapter 13 filer Holly Christine Adair is violating the federal law outlawing marijuana because the agency she works for,...