In Synergy, is it possible to set up your config so that you have one server and one client, both with dual monitors, but the client machine has its monitors such that one is on the left of the server's left monitor, and the other is on the right of the server's right monitor? For example:
+----------+ +----------+ +----------+ +----------+
| client | | server | | server | | client |
| screen1 | | screen1 | | screen2 | | screen2 |
+----------+ +----------+ +----------+ +----------+
Hopefully my ASCII is good enough to understand. Both machines will be running Linux. If there's a way to do it by messing with xorg configs that would be perfectly acceptable too.