User based restriction on lan for shared folders in ubuntu
 

Hi

I have 4 ubuntu machines and all are on ubuntu desktop 10 edition.

On one of the machines i have a few folders that are shared like

My Personal Data
My Songs
My Pictures

The share has been done with SAMBA under the ubuntu desktop.

Now i want that my songs are shared but not to all the machines only with 1 machine, but but internet which is on the same machine as the songs machine be still working.

How do i restrict users from opening my folders, please note i am very new to ubuntu so ur step by step guide would be very vey helpful for me.