Copying a build within the server is annoying but it's not against the rules, but posting other people's builds on the forums and claiming credit is just sad... anyway that kaimaximus guy probably will never get in the bt
There isn't anything you can do about it, you can deny the player from your plot so they cannot copy your work. But it's only when they try to join the Build Team where copy right isn't acceptable I believe.
I'd contact the player and talk about copyright and suchlike and either if they don't contact within 5 days or delete the plot, you will take action and contact staff. also i'd just contact the build team so they can't claim.
Update: Everyone, it turns out it was KaiMaximus who copied it, not exactly Zaralare. Zaralare's bf (Kai) copied it and claimed he built it and so which Zara believed him. I made a deal with Zara to clear the plot and i would help make her a new mansion, so she cleared it and we are currently building a new one. Can someone lock the thread?