samba and permissions
 

I have this sample share in samba:

[sample]
comment = blabla
path = /var/sample
valid users = user1 user2
read only = no
browseable = no
; printable = yes
create mask = 0555


and I want user1 to write but not to modify or delete anything
and user2 - no restriction
In sample above, problem is that files created by user1 is restricted from deletion to user2.
How can I solve this problem?

that's a non reality.
the ability to write means the ability to modify and delete (as they are both considered write actions)

I ask, because Windows has this ability.