On the concept of privilege, sure there's "relative privilege" like if you're with a group of friends and people pull out their smart phones to play some game-app together to kill the time and DAMMIT they all have Iphones and you have a Nokia so can't play, you could say they are privileged in that moment in a way that you aren't. You could also say there are qualifiers to quality of life and access to opportunity, like wealth, education, abled-bodiness, etc. other than race.
For the purposes of this campaign though it's talking specifically about white privilege in the context of the rest of society. Society trumps all. Whatever other microcosms and episodic situations one may find themselves in, those situations are all filed somewhere under Society. With a capital 'S'. That's also why this campaign exists. Because, even though there's a relative absence of people of color in that particular city (to be "privileged over") that doesn't change the reality of white privilege.
And that's an interesting point about paternalism or a 'saviour complex' that's been raised. Except in this case it's more "white people (through institutions) speaking to other white people (individually)" and not necessarily "white people swooping down to the inner city/Africa to help the less fortunate". Peers speaking to peers.
Also, statistically, there aren't a lot of people of color period in that city to be saved or lectured to in the city.
Also, Victor, I'm pretty sure white privilege happens in Australia, too.