How to restrict access to the sambe share in the router if the built-in server does not have such functionality? Is there any proxy samba server?

Question

System administration

Two routers:
1 tplink with ddwrt or openwrt
2 dlink that runs on stock firmware and has a stupid samba share (you can't restrict access to a folder if you have a login password, you have access to all folders).
Two folders:
Folder1
Folder2
Users:
User1
User2 It is
necessary to make sure that user1 alone has access only to folder1. User2 only to folder two.
How to do it?

Answer 1

Through the rights of folders/files of NTFS it is impossible?

Answer 2

There is no proxy, but you can pick up Linux somewhere, mount this SMB-share of yours and distribute from this Linux through a full-fledged samba :-)

Answer 3

"... The answer of the Supersystem instantly destroyed bright hopes: "The task has no solution" .. "(C) Leonid Reznik. There is no magic triangle
for SMB proxies. SMB has the ability to distribute rights, but apparently there is such a truncated implementation that they were thrown out as unnecessary.