Do I need a moisture barrier between sub floor wolmanit and engineered floating bamboo clip together flooring?
The floating floor needs the thin foam pad for it to function properly and most of the floating floor pads already have a vapor barrier as part of it.  But adding an additional barrier is not needed (unless you have moisture issues).

If you where doing a nail down install (instead of float) I would recommend rosin or tar paper between the the floors.  But it would not be for vapor barrier but to reduce noise between the two floors rubbing.