Let's consider this:
1. on our server we heave two (or many more) IP.
2. for client1 with site called site1.com we assign one of free IP (ie. 0.0.0.1)
3. for client2 with site called site2.com we assign second IP (ie. 0.0.0.2)
client2 is a bitchy one, and he want switch site of client1.
he can set in dns zone of site2.com pointing IP 0.0.0.1, then in sites menu
from IP-Address dropdown set ip 0.0.0.1 and done ...
in my install of ISPC3 (18.104.22.168) after that no matter what domain You type in browser site1.com, or site2.com You will see website from client2 ... site1.com
is gone ...
In my opinion client can't heave rights to change IP in sites menu, or better IP-Address dropdown shouldnt see this option anytime
I'm right ? or my install is "special"