Traffic Splitter (which is the application that I wrote to replace RouteSentry) is intended mainly for splitting local and international traffic through separate accounts/network interfaces.
To make use of my application, you'll need at least 2 separate Internet connections/accounts. My application will not be able to split the local and international traffic on a Telkom blended account, unless you pull off that exploit

You can however use Traffic Splitter to split the local & int traffic if you have for instance:
a) 1 Telkom blended account which you're using for international, and an IS/SAIX local only account that you're using for the local connection
b) 1 Telkom blended account which doesn't have international cap left + an Axxess Lite 1GB account (R19) which gives you international access
Following Milomak's post: i'm not sure if your router supports half-bridge mode - aka PPPoE relaying / PPPoE passthrough - which in essence allow your router to dial a default account that everyone in the house can use for Internet access, but it would also allow any other PC connected to it to dial its own Internet account too.
If your router doesn't support half-bridge mode, you'd probably be better off buying a MikroTik RB750 which can do all the traffic splitting for you. I'm using on in my home to split traffic across like 9 different network interfaces/devices: PPTP VPN's, PPPoE connections (normal ADSL accounts) via 384kbps ADSL, 2Mbps SDSL, 20Mbps WiFi
I'm not sure who began with the whole "splitting the traffic" thing. They should've stayed with the correct terms of "routing the traffic", which is what an ADSL router is supposed to do. Unfortunately most ADSL routers is just a glorified ADSL modem with NAT.
The DSL-2500U router that I have can actually dial multiple PPPoE connections simultaneously, as well as route the traffic via the appropriate account.