Microspeak: of barriers...
feewall
A barrier of demarcation for financial responsibility. "Does this project fall on our side of the feewall?" translates directly as "Do we have to pay for this?"
firewall
(General industry usage) A cyber-barrier. Ex: "Let's build a firewall on the website to separate editorial from advertising." Also increasingly common parlance for a barrier or separator in any context, not just cyperspace.

© Ken Barnes

In a world of limitless communication facilities, it looks as if barriers will remain a feature of the landscape... something to do with human nature?