In AutoCAD: (1) When you display labels, the result is created in the layer triLabelLayer. (2) When you display a report, the result is created in the layer triFillLayer + triLegendLayer. Is it possible to create one layer per report, in order to keep the result of several reports directly in the drawing?
No, that is not currently possible. The result of a runtime report/label will always be applied to the aforementioned layers and replace what was there prior.