Different lineweights can be done but it takes a combination of work in SU and in LO. None of it difficult fortunately.
Here’s a screen grab from LO where I’ve done that. Your building outlines are still set to 2 pt, the property lines are at 1.5 pt, and the rep cor is set to 1 pt.
First in SketchUp, I made three scenes with the same camera position.
Then in LO, I create three layers for model viewports.
The building and road outlines are on Model 1, RepCor on Model 2, and Prop Lines on Model 3. To stack the viewports, you simply copy the viewport from one layer and paste it to the next layer and in the SketchUp Model panel, change the scene and adjust the line weight as desired.
Here I have the Prop Lines viewport selected. You can see it is on Model 3 Layer and the line scale is set in SketchUp Model.