Step Gap Edge Loop - like modo selection
Modo selections style in 3ds max, but only for edges.
Assign a hotkey(or button), select 2 verts/edges/faces woth desired gap between them and start pressing your hotkey.
Work only with Editable Poly objects
Drag-n-drop "StepGapEdgeLoopLR.mzp" and "StepGapEdgeLoopLR.mzp" in 3ds max. Go to Customize-Customize User Interface. Under "miauu" category you will find "Step Gap Edge Loop Right-Left" and "Step Gap Edge Loop Right-Left".
Big thanks to Anubis for his help.