Ok for example you can put the 8021q switch. then let say you need 3 vlan use 3 bridge and connect the bridge to the switch, so brd1 = vlan 10, bridge2 = 20 bridge3 = vlan 30
then connect all pc that you want in in the same vlan to the respective bridge
but still you would need a L3 router for inter vlan routing
another scenario is dont use bridge use all dot1q switch and you can conbine pc of different vlan in different location for example