After reading through many articles it seems that there is no built in way for osx lion to search network drives. We have found a free app called Easyfind that allows you to search any location on your mac as well as inside archives, files and folders. You can download it from their website http://www.devontechnologies.com/products/freeware.html
The Finder hides the standard Unix files and folders from you. You can “Go To Folder…” and type in the name of the folder such as /var/log, but that’s fiddly and you still don’t see the “dot” files. There’s a terminal command that will make all files and folders display in your Finder. To do.