Yes.  In CET Designer, you can import an AutoCAD drawing with ProjectSymbols from AutoCAD or CAP blocks from AutoCAD.  Originally the drawing will come into CET as one large block.  Through the ProjectSymbols tools, you can select the Convert Drawing button which will convert all of the attributed AutoCAD blocks (ProjectSymbols or CAP) to individual blocks in CET which can be modified, re-optioned, rendered and specified.