Nortel Contivity Universal Device Poller

So, as much as I hate to admit it we do still have a Nortel Contivity box bungling along until the day it (hopefully) fails.

I'm trying to create a Poller to return a list of current active VPN users, now I've found the OiD I needed using the SNMP walk however in practice it also returns irrelevant values because they are listed under "interface names"

.1.3.6.1.2.1.31.1.1.1.1.1 = STRING: "lo.0.0.0.0"

.1.3.6.1.2.1.31.1.1.1.1.2 = STRING: "fei.0.1"

.1.3.6.1.2.1.31.1.1.1.1.3 = STRING: "fei.4.1"

.1.3.6.1.2.1.31.1.1.1.1.4 = STRING: "clip.0.0.0.0"

.1.3.6.1.2.1.31.1.1.1.1.68374 = STRING: "Some Branch Office 1"

.1.3.6.1.2.1.31.1.1.1.1.68416 = STRING: "Some Branch Office 2"

.1.3.6.1.2.1.31.1.1.1.1.69021 = STRING: "Some Branch Office 3"

.1.3.6.1.2.1.31.1.1.1.1.69074 = STRING: "Some Branch Office 4"

.1.3.6.1.2.1.31.1.1.1.1.1073877481 = STRING: "Bob Bobberson,UID=vpn.bob.boberson"

.1.3.6.1.2.1.31.1.1.1.1.1073877483 = STRING: "Steve Stevenson,UID=vpn.steve.stevenson"

.1.3.6.1.2.1.31.1.1.1.1.1073877488 = STRING: "Dave Davidson,UID=vpn.dave.davidson"

.1.3.6.1.2.1.31.1.1.1.1.1073877492 = STRING: "John Johnson,UID=vpn.john.johnson"

.1.3.6.1.2.1.31.1.1.1.1.1073877497 = STRING: "Max Amillion,UID=vpn.max.amillion"

Is there an easy way to filter out the first 4 values and return only the BOTs and Active Users? I've been playing around with the transform but so far I've not been able to find anything that will work.