Let’s consider the following situation:

You have got three domains:

mydomaina.com (“main” domain)
mydomainb.com redirected via HTTP 301 to mydomaina.com
mydomainc.com redirected via HTTP 301 to mydomaina.com

You can perform link audit for all of them at the same time! To do so, separate domain names with “;” (main domain should go first) like this:

And that’s all! Now, perform analysis and you will get one complete project instead of three.