>So i need to have "Hello" in one text layer and "World" in another one ?!!!
Thats correct. In the current version you would have to make two seperate
words. In the next release of GIMP (2.8) the text tool will be enhanced as you
can see in this preview under step 4:
Bernhard S. (via www.gimpusers.com)
Gimp-user mailing list