A native or alien in a dream usually indicate an unusual lifestyle, i.e. any change in lifestyle. It may be a trip outside of the country in which you live, even a region or district of residence, if you rarely travel. So a foreigner can indicate the manifestation or emergence of new aspects of the nature, character, habits. The membership of ethnic group or country, indicates which features are new.
Indigenous life, like life abroad, in dream indicates changes in your life. If the plot of the dream residence abroad like the feel of the time — change for the better. And Vice versa.