On the Turning or Milling or Cut Data tab of each FeatureCAM feature is a Post Vars. Button. This button brings up the Post Variables dialog box which contains 9 separate variables that are passed directly to the post processor. You can use these variables to pass strings directly to the post processor.
See Post Processing in FeatureTURN or Post Processing in FeatureMILL for more information. See Examples of logical expressions on how to check to see if a Post Variable is set.