The Wikimedia Foundation policy angle may be worth looking into, although I suspect its intended to restrict the actions of the foundation itself (as opposed to editors or projects). It probably would not make sense for the company to have a role in regulating local project processes for determining administrators, 'crats, etc. Once you get beyond determining basic fitness for handling private data it'd be slogging through a quagmire.
As to the legal question - I seriously doubt that any element of the RfA process on the English Wikipedia could give rise to a credible discrimination claim. Anonymous editors, unpaid and anonymous unofficial role, no employer-employee or other legal relationship between the candidate and any other editor or the WMF, etc. It would be interesting to see someone with knowledge of the law try to argue the point, though.
Nathan