Hello Gildas,
Although we don't cover Spring Security with OSGi in the book, the significant class and package detangling that Luke did in Spring Security 3 makes Spring Sec much more OSGI-friendly than earlier versions, although I think there have been a handful of bugs reported since it was released. I suspect with continued adoption of OSGi and DM Server, more people will be exploring it and (hopefully) documenting any issues.
Sorry that's not much of an answer
Best,
Peter
Author, Spring Security 3 (the Book), Packt Publishing, 2010
SCJP, OCP