I found the solution:
First I compile my App with Webworks SDK 2.2.0.5 for Playbook with an ID of Name and I get a hashed ID from this compilation. Second I compile my App with SDK 1.0.4.11 for BB10 with the ID that I got from the first compilation (inside the MANIFEST.MF file of the package)
=>The result is I have two packages for different platforms with the same Package ID