Ignore a single subfolder installing files with recurse

Hello everyone,
I'm facing an issue I can't resolve. I've a folder with many subfolder I want to install it, but, some of these subfolders need to be only for some customers ( there is a password dialog to understand which customer "type" is installing the software). There is a way to tell the Install Files command to "install all the files of this folder, recursively, except for this subfolder"?

I tried to use the "exclude the following files" using the folder name and the \*.* wildcard, but it don't works.

Please can anyone help me?

Thank you

Nicola