VLAN switching on freebsd

[Özkan KIRIK]

Hi,

i need to create a virtual interface that forwards only defined vlan tags.
Lets talk on a sample scenario :

Assume that VLAN 10, 20, 30, 40 tagged on switch connected to em0 interface.

create ngeth0 and ngeth1. ( i dont need netgraph interface, it can be a any
virtual interface tap .. etc. )
i want to see only VLAN 10, 20 tagged on ngeth0
and VLAN 10, 30, 40 tagged on ngeth1

I tried many ways but no success.

Can you suggest a way to do this?

Best regards