NSSortDescriptor *last =[[NSSortDescriptor alloc]initWithKey:@"lastname" ascending:YES];
NSSortDescriptor *first =[[NSSortDescriptor alloc]initWithKey:@"firstname" ascending:YES];
NSSortDescriptor *company =[[NSSortDescriptor alloc]initWithKey:@"company" ascending:YES];
NSSortDescriptor *email =[[NSSortDescriptor alloc]initWithKey:@"email" ascending:YES];
[request setSortDescriptors:[NSArray arrayWithObjects:last, first, company,email, nil]];

Allen,Joe,microsoft,ja@microsoft.com|Allen,Zack,google,nil|Smith,Tom,Apple,nil

Allen, Joe
Allen, Zack
Smith, Tom

Allen,Joe,nil,ja@gmail.com|nil,Zack,nil,zack@msn.com|nil,nil,nil,raj@gmailcom|nil,nil,cloudflare,nil

cloudflare
raj@gmail.com
Zack
Allen, Joe

raj@gmail.com
cloudflare
Allen, Joe
Zack

Allen, Joe
cloudflare
raj@gmail.com
Zack