I don't think there is. At least I didn't stumble across it yet.
This does not work for me in LibreOffice, Pages or Textedit. There is no option (I can find) to enable or disable it in system preferences including the "secrets" prefs pane. It doesn't show up in tinkertool either. So Apple may be bringing iOS to OS X but they aren't letting us type multiple blanks to get a period. And yes I tried it during this post in Chrome. It doesn't work here either.