There is no quick-and-dirty solution. My guess is you're unlikely to get much technical support from GoDaddy so you need to do it yourself. I tried to point you to an answer but the system will not permit a link so have pasted below.
You should activate name-based virtual hosting and only show your real website for the desired domain names. For all other names, you can display a suitable error message.
Details: Your webserver is contacted by its IP address. There is nothing you can do to stop that. Anyone can say, "connect to that IP address". For instance, anyone can register new domain names to point to your server's IP address. However, inside the request, there is a field "Host" which can point to a specific domain.
Upon receiving the request, your server may choose to inspect the Host field and deliver different content depending on that value. In the simplest case, the server ignores the field entirely and always prints out the same content. But in a more sophisticated set-up, so called "name-based (virtual) hosting", the server chooses the content depending on the hostname.
This is how shared webhosts work: There's a single server, but depending on the requested hostname it spits out a different website for each name.
Therefore, if you want to tie your server content to your hostname, you have to tell your server to produce your website only for your desired name, and to produce a different (error) website for all other cases.
In Apache this is trivial to configure, just check their documentation; for IIS I wouldn't know but I imagine it's equally simple.

Originally Posted by
Sergej_AGR
Hi,
I have parked a website to maybe work with it in future. Now I found an other website that has a full copy (two articles lol) of my website. I had a chat with godaddy where the domain is hosted and we discovered, that it is not a real copy. - His subdomain is pointing to my dedicated IP.
I donīt care if it is legal or not as the support told me. I dont want to see other domains with my content, my "about us" etc.
Is there anything I can do???

Thanks in advance.