Yes.
Hide a single diamond's report number
When uploading a single diamond > turn off the 'Show on RapNet' button before saving the lot.
If the diamond is already listed, go to “Manage My Diamonds” > Find the diamond > Edit> Turn off 'Show on RapNet' > 'Save Lot'
Hide report numbers when uploading with Excel or CSV
Add the field name "Display Cert Number" to your inventory file
The field value = N or No