My guess is that this applies to property owners/landlords looking for tenants. The article talks about finding roommates, which I'm pretty sure is ok to pick and choose...
I will try to find the article I read on this recently.
UPDATE: roommates can choose based on gender only where there is a shared bathroom, kitchen or common area. That is all.
"in a situation in which a landlord owns less than four rental units, and lives in one of the units, it is legal for the owner to discriminate in the selection process based on the aforementioned categories, but it is illegal for that owner to advertise or otherwise make a statement expressing that discriminatory preference."
What an excellent way the time of people looking for housing.