Mimic Xcode's camelCase selection keyboard shortcuts in OS X
Sorry but what you want is not possible.

You could try adding the XCode keybindings that do this

"^\UF702" = "moveSubWordBackward:";                     /* Ctl-Left Arrow */
"^$\UF702" = "moveSubWordBackwardAndModifySelection:";  /* Ctl-Shift-Left Arrow */
"^\UF703" = "moveSubWordForward:";                      /* Ctl-Right Arrow */
"^$\UF703" = "moveSubWordForwardAndModifySelection:";   /* Ctl-Shift-Right Arrow */
"^\177" = "deleteSubWordBackward:";                     /* ctl-delete */
"^\UF728" = "deleteSubWordForward:";                    /* ctl-forwardDelete */


into your ~/Library/KeyBindings/DefaultKeyBindings.dict file but unless the application is written to respond to these methods, it won't work.  As you've said, these methods are not part of the standard Text System so these calls in an app will just go unanswered or you will get a system beep.