Smolak

Perpendicular Snap with conjuction with grid snap if you want exact distances. Unfortunately quantization doesn't work with PolygonPen :
 
 
PolyPen.avi

AR_RemoveEmptySelectionTags.py from aturtur/cinema4d-scripts: My collection of Cinema 4D scripts (github.com)

You can assign shortcut key to the "turn on-off" command :
 

I found some dirty workaround to drive materials by vertex map applied to material alpha channel since newly created polygons have the same vertex map value that their parents. Unfortunately this is not visible in OGL preview. And these polygons must be disconnected since there is no vertex map sharpen tool. 
 
EDIT :
 
I found complete solution - just use fields in polygon selection tag ! Move vertex map to fields window of selection tag and :
 

 

 
EDIT 2 :
 
If someone is interested there is much better solution to use with CV-Parametric Selection. Select polygon, find it index in structure panel, disconnect it and use the index in CV-Parametric Selection as index + post effect= connected. Output to Selection tag which is connected to any material. All new created polygons from the main polygon will have the same material.
 
CV-Parametric script can be converted to Python3 version using this site : https://www.pythonconverter.com so it works with R23 too.