Licenses provide legal protection for the work produced by authors, artists, and other creators. Laws vary among countries and Lulu is not in a position to determine the specifics of the intellectual property regulations in your country. However, various international treaties and agreements regulate the treatment of intellectual property.
Here are links to a variety of sources that discuss intellectual property.
Lulu also allows its creators to design a personalized license. The University of Arizona Library provides the Alternative Publishing & Copyright Agreements page, containing links to a variety of agreements you may find helpful.