protected override void FillClaimsForEntity(Uri context, SPClaim entity, List<SPClaim> claims)
{
    if (entity == null) throw new ArgumentException("entity");
    if (claims == null) throw new ArgumentException("claims");


    var userLoginEncoded = SPUtility.FormatAccountName("i", entity.Value);
    var userLogin = SPClaimProviderManager.Local.DecodeClaim(userLoginEncoded).Value;

    if (userLogin.IndexOf("nt", StringComparison.InvariantCultureIgnoreCase) >= 0)
    {
        return;
    }


    SPSecurity.RunWithElevatedPrivileges(() =>
    {
        using (var site = new SPSite(context.ToString()))
        {
            var serviceContext = SPServiceContext.GetContext(site);
            var profileManager = new UserProfileManager(serviceContext);
        }
    });
}