3D Multi-Grid for Localized Refinement around an STL

According to the User’s Guide, grid refinement is only available for 2D cases. However, in looking through the source, I’ve found things like multiGrid3D.cpp that implies some level of implementation. I would like to work on an adaptive refinement scheme around an STL geometry. To start, I would want to have a coarse grid, with high refinement around a geometry and medium refinement in a wake region. Does Palabos 1.4r1 have the capabilities to do this? Are there implications to running a 3D multi-grid in parallel? Thanks!