A single SpeedFusion link can carry multiple sub-tunnels, each with its own behavior.

Under link settings you can create up to five sub-tunnels (plus the primary), each configured independently — one bonding, one WAN-smoothing, one FEC, one hot-failover — and then steer different traffic to each with outbound policy.
Layer-2 bridging

Layer-2 bridging extends a VLAN across the tunnel so two sites share one subnet (e.g. both on 192.168.45.0/24, gateway .1 at the hub). You can even run multiple Layer-2 sub-tunnels to span different VLANs (VLAN 40 on one, VLAN 50 on another) alongside a bonding tunnel.