The only way I know of to filter the stack trace view is via Mylyn. If you have an active Mylyn task, and you click the "Focus on Active Task (experimental)" button in the Debug View, then the stack trace will be filtered to only show those methods that are in the current task's context.
In this case, you wouldn't be filtering certain items from the stack trace; rather, everything would be out by default, and only certain items would be displayed (those in the task context).
You can look at this answer for more about Mylyn.
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