Conduit to run ethernet and coax from basement to attic
That hole is a firecode violation.  It should be air sealed around the penetrations - as it stands it is a chimney for a fire.
As far as conduit to separate the low voltage wires from the line voltage - are you pulling one end back to get the conduit onto them?  a staple and a zip tie to keep the wires to one side of the hole would probably work just as well.