I am not familiar with the Oracle WebLogic license model. If the standard and server inventories don't give you what you need for evaluating software licenses, ITMS has a very flexible custom inventory option where you can pull any information that you can grab with a script and store it in the datbase for reporting purposes.
If you own Asset Management solution you can track licenses using the steps shown in this link. If you click the link in step 5, it explains the different licensing models supported such as per device, per user, per processor/core, etc.
https://help.symantec.com/cs/ITMS8.0/ASSETSUI/v45283436_v116264747/Managing-your-software-license-compliance-on-the-Asset-Management-Solution-pages?locale=EN_US