[Samba] Problem with subfolder permissions

[Jethro Hermans]

Dear,

I want to do the following set-up but I don't succeed in it:

e.g.:

users: user1
         user2
         user3

share: "test" with access from user1,2 and 3

Now I want to create a subfolder in "test" e.g. "subtest" but only with 
access for user1 and 3 but I'm not able to do that.
Is there a solution for this?

Thank you,
Jethro