http://bugs.winehq.org/show_bug.cgi?id=17754
--- Comment #5 from Jeff Zaroyko jeffz@jeffz.name 2009-03-17 04:43:08 --- (In reply to comment #4)
Should there be any issue with a program running under Wine to access a native Linux Oracle client?
You'd have to write a Wine .dll.so wrapper to do that.
To use your program you must set it up as you do on Windows, so if it needs the oracle client then you need to install it in Wine.