Isolate VLAN - 1910 - 500

Hi.

I would like to know how I can isolate a specific vlan from the other vlans without using an ACL to deny the traffic?

Denying the traffic through an ACL works but I would like to do the inverse. Isolate the vlan 202 and only permit through ACL the UDP because the DHCP service and the traffic to the firewall.

The access switches are 1910 and the core 5500 HI.

Thanks in advance.