Yes, you can use your own domain for your personal/custom vhost.
Just point the nameservers to -
Then open a ticket in our Support system or by emailing support@Xzibition.com giving the custom vhost you want to use. We will then add the reverse DNS entry.
Or if you control your DNS and can point an A Record, open a ticket in the support system or contact support@Xzibition.com for an IP and the vhost you want to use.
Custom IPv4 vhosts are normally an additional cost, we provide free IPv6 (if available) vhosts to anybody who asks.
A custom vhost can be created using a domain you own or one of Xzibition's listed at http://www.xzibition.com/domains.php
For example: some.thing.domainfromlist.com