Just do it… nothing stopping you.
If the attribute you want to use for “strength” is on your wrapped geometry then you just use it but if it is on the Target Geometry then you can pipe it through the Raycast node.
E.g. here the “strip” that the GN is applied to is wrapped to Suzanne and the offset is controlled by a vertex group on Suzanne (visualized in white).
Note the Normal is reversed because the “strip” Normals are pointing up (or more precisely, outward).