You could create a local script or package that checks for the software on a local endpoint, then writes a value like VSE to the McAfee Agent's CustomProps 1, 2,3 or 4 fields. This can be done with the following command example:
FrmInst.exe /CustomProp1="enter a value to tag by in ePO"
... then whent he client checks into ePO, you can drill down to that clients computer properties and you will see the Custom Props value added, which then can by used in the Tag automation filters. Hope this makes sense...
Good luck,
JerryPCJr