iRule to select pool based on client IP and group data list

Thanks - so what I'm trying to accomplish with this is to add new members (and new IP addresses) to a pool as a part of an upgrade so we can use the same VIP, but we only want traffic to go to these members from specific IP addresses.

Additionally, I'm trying to elimiate creating additional pools for these new systems if possible. When the exising members are retired, we then want traffic to go to the new members. Trying to determine an irule that may be able to accomplish this.

Any ideas are appreciated.