Hi, i want to know if it's possible to set subdivision surface just inside karma and not in opengl viewport, thanks in advance

You can use the Mesh Edit LOP to set the Subdivision Scheme on primitives.
Or
The Scene Import/SOP Import/SOP Modify LOPs have the option to "Treat Polygons as Subdivision Surfaces" under the Geometry Handling section. The Component Geometry LOP (part of the Component Builder workflow) has the same option.