After adding a sever to ISPConfig, is it possible to assign (or restrict) a client to only that server? For example, we have an existing multi-sever setup for our own virtual hosting of clients' websites and DNS, but a client may want a dedicated server, so my thought was we could do an all-on-one server install for them (web, DNS, e-mail, etc.), but add the server to our ISPConfig but when we add the client restrict them to just their assign server for adding their own websites, DNS, etc. We would still be able to monitor and access that server through the one CP, but when the client logs in to their CP they would only see their own server as a possible destination when they add a website or e-mail, etc. I hope that makes sense?