No, it just means 'female foreigner'. I'm an expat living in Mexico and thus I'm considered a foreigner. There are other words for foreigner, such as foráneo, but here that is reserved for someone who is from out of the state. Extranjera is a polite word, it doesn't have negative connotations as foráneo does or even as 'foreigner' does in parts of the US.
I kind of like mystique or intrigue though
