Route traffic to different local IPs from one public IP based upon header value?

I've used both a Google search and the forum search to try to find an answer to this question with no luck. Of course, I may simply be wording the search incorrectly in order to find the answer. :)

What I'd like to do is be able to direct traffic to multiple local IP addresses based upon the header value when the domain address resolves only one public IP address.

For example, let's say that I have the domain address "dev.mydomain.com" which resolves to the public IP address 65.66.67.68 from the internet.

Now, let's say that I have these five local IP addresses that I want to share that domain/IP address with:
- 192.168.1.10
- 192.168.1.20
- 192.168.1.31
- 192.168.1.32
- 192.168.1.33

The .10 and .20 IP addresses point to two different physical machines while the .31, .32, and .33 IP addresses point to three different virtual machines running on one ESXi server.

I would like to use the dev.mydomain.com domain address with different header values to access the different machines, either as:
- whs.dev.mydomain.com[?query-or-/folder/structure], lamp.dev.mydomain.com[?query-or-/folder/structure], xp.dev.mydomain.com[?query-or-/folder/structure], win7.dev.mydomain.com[?query-or-/folder/structure], and win8.dev.mydomain.com[?query-or-/folder/structure]
OR
- dev.mydomain.com/whs[?query-or-/folder/structure], dev.mydomain.com/lamp[?query-or-/folder/structure], dev.mydomain.com/xp[?query-or-/folder/structure], dev.mydomain.com/win7[?query-or-/folder/structure], dev.mydomain.com/win8[?query-or-/folder/structure]


Is this possible to do via the Untangle Server? If so, how?

Thanks.