404 Error Behavior on Godaddy (aka the Redirect)

My goDaddy account for hosting and on that host i have multiple domains. goDaddy offers me only one 404 redirect for all of my domains:

* domain1.com/gadfgsdf (nonexistent link) is redirected to domain1.com
* domain2.com/gadf (nonexistent link) is redirected to domain1.com
* domain.com/sagsdg (nonexistent link) is redirected to domain1.com

I need for one of my domains to make the redirect on the same domain:

* domain4.com/gsdhgfhf (nonexistent link) to be redirected to domain4.com

I am on Windows and i am using WordPress on all of my domains. I looked for the web.config file but didn’t find it. I new at this and i would really appreciate it if you can explain more detailed.

Thanks