Still not work in Kubuntu 11.04 Beta 1.
1. Installed kdenetwork-filesharing (should be by default?)
2. Try to set the grant access in Share tab of Dolphin folder "Properties" but the changes are not applied.
3. To apply the changes I must reboot but the changes are only apparent, if I try to browser the folder via samba from other PC I can't for grant problems.