With ARForms User signup Add-on you can set custom user meta with registration form. That means you can set additional fields other than wordpress standard registration fields. You can select existing user meta as well as set new meta(s).
Demo: http://codecanyon.net/item/user-signup-for-arforms/8329487
https://www52.zippyshare.com/v/oLVwrrhN/file.html
http://userscloud.com/vm5an3a6d6eq
http://ul.to/uhnphgc8
https://www.sendspace.com/file/suhw7m
https://sendit.cloud/yl5dlbqjj21d
https://openload.co/f/wHObbfXzErI/usersignupforar16.rar
http://www.mirrorcreator.com/files/0W3U2FFM/usersignupforar16.rar_links
http://www.mediafire.com/?ni9a4buk3l42izc
https://www.file-upload.com/be78vb7vazha
https://www.datafilehost.com/d/ba93429d
https://dailyuploads.net/9p60hp4a3i71
http://cloudyfiles.com/06t12pw4xx4d