hello everyone

I am little confused in assigning permissions so my configuration is following.
Server running centos 7, samba-4.2.3-10. On server are configured several shares.

Example:

users:
user c initial group: w supplementary: c
user d initial group: w supplementary: d

groups: w (all users)

shares:

share1 root:c rwxrwx---
share2 root:d rwxrwx---

Everyone is happy so they can access their shares in their own directories, but I
needed to allow user d to access all data in share1 directory. so I have assigned
permissions with: setfacl -R -m u:d:rwx share1. now user d can access all files in
share1 directory and it's ok. Also user c can read and write files created by user
d as it creates with group w.

my question is, what if I need to allow user d to access data inside share1 to
specific directory not entire directory?

thanks