Thanks for your anwsers. Is there any other possible solution, to use Maptool flat on a Display (no homemade Projektor-Table) and all PCs around the Table can move her tokens? I dont need a full multitouch solution, only Map and Token Movement!
Well, as jfrazierjr said, if it can emulate those four actions, it would probably work for basic token movement. You would still want a server running on a standard computer for GM-specific stuff and the more complex operations, though.
Essentially, you'd have the multi-touch connected as a client, with ownership of all the PC tokens. As long as the multi-touch can emulate the drag-and-drop action, it should work for basic movement. Single-clicking to select tokens and activate macros should work with no issues.
Another option would be the convertible laptops with the screen you can rotate and flip over, like this
. With that, you can flip the laptop screen so it faces up, hook up a mouse, and you're good to go. This option would allow full use of the tool, since you'd be using an actual mouse.
EDIT: Actually, now that I'm looking at the specific link you posted... The Dell ST220T is just a monitor, so you can always run the mouse up to the table from the computer it's hooked up to. Or, for that matter, just hook the monitor up to a closed laptop on the desk, and set the mouse right beside that. Either way would allow the players to move their tokens if the touchscreen won't work for that. The convertible laptop would take up less room on the table, though.