Is there any way in a traffic policy to match on IP address?

Is there any way in a local traffic policy to match on IP address? For example, being able to say, "If the source IP is such and such, do this", or "If the destination IP is such and such, do that?" I can't seem to find any way to do this. If it's not available, is there any way to suggest this as a feature?

Specific Scenario:I have an ASM farm configuration. Various VIPs on the LTM send traffic to the ASM farm for processing. To make administration easier and cut down on IP address usage, each ASM has a single VIP for processing. The LTMs each use a different SNAT address when sending traffic to the ASMs, and I would like to be able to apply a different APM policy depending on the source IP address of the traffic.

I've had this setup working since the 10.2 days using HTTP classes and an iRule: the iRule looks up the IP source addresses in a datagroup file, and then does an HTTP class match to select an HTTP class containing that ASM policy.

The problem is I'm stuck on 11.3 because HTTP classes have gone away in 11.4, and are replaced with local traffic policies. But there is no equivalent "local traffic policy match" iRule command to pick a specific traffic policy containing my ASM policy, and the local traffic policy also doesn't seem to have any way to write a rule that matches based on source address. So I'm concerned that there is no equivalent functionality to what I could do before, and that there is no way to move forward without re-archictecting unless I can get the local traffic policy to match on source address somehow.