You can now Offset to a current layer. In the OFFSET command prompt there is a nrew option to set the offset to be on the current layer rather than the same layer as the entity being offset.
An example of how this could be used is you have one layer for interior walls and one for exterior. When you wanted to offset the interior wall for the exterior, you could have the exterior wall layer current and the offset line would be on that layer instead of the same interior wall layer.
Current settings: Erase source=No Layer=Current OFFSETGAPTYPE=0
Specify offset distance or [Through/Erase/Layer] <1.0000>: