LTCC layout process is nothing new, it's layout process is like thick film hybrid. XpeditionPCB support this process very very well.
you can open the sample data (whichi is a LTCC design.) from VX.1 3D layout toturial, and you will see how well XpeditionPCB supports caviaties, embeded passive, stack die etc.
For general LTCC, you have to see other industrial guides from greetape vendors .