Asymmetric routing condition with two "external" networks

Iis there an iRule or some configuration I can put on the F5 so it will never send traffic for nodes through the 104 interface and to always send these packets to the default gateway (the FW)? We do have virtual servers on the F5 with node pool members that are on the 10.101.104.0/24 network, but I'd want even this traffic to go through the firewall.when node A is connecting to node B, does F5 do destination ip translation (i.e. host virtual server) or just forward traffic to node B (e.g. network or wildcard virtual server)? would it be possible to let F5 do only forwarding traffic for node B through firewall (e.g. network or wildcard virtual server with firewall as pool)?