Another idea.... or actually a possible work around.
If you like the texture at it's current settings for part of your mesh, and not able to divide it up into component parts (i.e. in a modeling program) and you wish to stay with procedurals, instead of uvmapping.....
Then....
Duplicate your mesh, be in object mode(not world mode) and resize the mesh (in place) just at 101 in each of the coordinates that need changing. If it's ok in the x, then change the y & Z... and shrink the x dimension to 99, then texture this. Group both so when you move them they will stay together.... Might be a small enough change in dimensions to allow you to texture different without being obvious that it's two meshes.
This is just a possible work around to your problem. Seeing an image and your settings, might mean not having to go through this though.