NameMapping - Can You Use A Project Variable And Add To It Like A Constant?

I am aware that you can use either a Constant or a Project Variable, but is there a way to use both?

For instance if I have multiple environments such as: www.mysite.com, www.dev.mysite.com, www.qa.mysite.com and my test goes to www.mysite.com/account/profile/update how can I do something along the lines of
(Property, URL)/account/profile/update so that the NameMapping and tests can be ran on all environments without changing anything but the URL?

I came from Ranorex and this was a normal thing, but I cannot seem to find it in TestComplete. Any help would be greatly appreciated.