Raster masking ?

Hello all, 

I've been using CorelDraw as my primary prepress design tool for years. If there is one feature i wish it had or maybe i'm overlooking, it would be the ability apply raster images for masking. Particulary for spot density fills. I hate having to export to CS in order to achieve this, and am curious if there's a work around , if i'm overlooking it (i've never discovered a way to do this in X5,) or if there's going to be any development in this area. 

Thanks!