In this previous post link at the end of this mail , Andrew demonstrates in the Parasitic Aware Design tool, how the combination of R and C cell filers then individual net filters set to "none", net parasitics could be excluded from a complete RC extraction. I tried this and when I netlist the refined extracted view I still see parasitics on the excluded nets.
Here is the filters setup and the refined extracted netlist showing a parasitic cap on net VFB
Here is the original post with example from Andrew;
Parasitic exclusion - Custom IC Design - Cadence Technology Forums - Cadence Community
IC6.1.8-64b.500.19