Do you have some reason to believe that this model of TV supports WOL? As far as I know, most TVs do not support WOL, but it is possible that some more recent TVs are offering this feature now that ethernet TVs are becoming standard.
If you have the ability to use CEC that is a different story. You need a special CEC hardware device and then you need a way to control it through software. Possibly through XBMC or EventGhost but I have no experience with this. You can't control any CEC directly from Vox though, you would need to go through another program. In my opinion CEC is not worth the trouble because it is quite limited and devices seem to do what they want by being "intelligent" and trying to "help you" by making assumptions.
IR (infrared) is a very good solution if you don't mind spending a bit of money. The nice thing is that you can control many devices with a single IR transmitter.
The USB-UIRT that Kalle recommended is excellent and works very well with VoxCommando. If you want something that you can plug in anywhere, you can get the iTach wifi2IR (also works with VoxCommando).
Both of these solutions support blasting IR across the room (about 10 to 30 feet depending on the device and the correct placement of things) or with a ir emitter from an auxiliary port that you can tape directly to the IR sensor on the device you want to control.
btw, Fallenone, it is fine to post in German but Google translate is failing to translate much of what you write. Please be careful to use simple language (no slang or Colloquialisms) and be careful to avoid spelling errors. This way non-German speakers will be able to read your German posts by using automatic translation.
I must admit that I am guilty of doing the same thing in English, because I type too fast...