I did a search, but nothing came up. I'd like to have private, password protected folders in Lightroom. I don't want to have a separate catalogue. Basically I want the photos that are in the private folder show black in the main library and to view you need to click on the folder and put in the password. Is this possible? Thanks.
The workaround that I know of is the one you said you didn't want. Multiple catalogs. Your operating system most likely has third-party add-ons that can prevent files in a folder from being accessed until a password is provided. You would probably lock the catalog that has these photos.
I doubt it will be a feature in the future. But you can submit a feature request if you want to Photoshop Family Customer Community