provided that you have enough resolution on the lines (if no, use a resample node to increase the points on the lines), you can try to append the new houdini17 “attribute noise” node just before the polywire.
By default it modifies the Cd attribute, just change it to “P” and play with the parameters.
As Andr said you can play around with the new attribute noise, if you want more control use a point vop with your own setup where you can create attributes to affect different areas or make more complex noise displacements. Maybe use it before the polywire with the voronoi fracture.