.DS_Store creation disabled on network shares, but I want them enabled for a specific share
I don't think you can have it both ways. 

I can imagine a bit of a work around that involves the Mac knowing what network it is on, and then changing the defaults write command to match the network.
Something like http://www.controlplaneapp.com/about/ would help you get that done.

(not the simplest solution I'll admit)