Though I'm not entirely clear what is being asked. I'll try to simply provide you a solution with FAS2240-2HA.
You have 4 Ethernet ports on each controller.
Now, you want to use 3 protocols : CIFS/NFS/iSCSI.
The question is how are the N/W for these protocols divided ?
Your question is : How can you share NFS/iSCSI on 2 NICs and have 2 NICs free for CIFS.
Answer : You can share 2 different VLAN's ( NFS & iSCS) on same LACP VIF by using VLAN Tagging feature. If that's what you are looking for.
Can you describe your architecture in more detail ?