Somebody do need it, such as http://ubuntuforums.org/showthread.php?t=954887
The patch works as:
# Double press Ctrl+Alt+Left or Ctrl+Alt+Right to switch local active workspaces.
# Double press Ctrl+Alt+Tab to switch local active window.
# Other hot keys are sent directly to remote machine.
You can download a patched bin file to see the effect: http://blog.sunner.cn/2009/10/rdesktop-patch-switch-local-workspaces-and-windows-by-local-hot-keys/
Switch Local Workspaces and Windows by Local Hot Keys
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