You can create new plugins for the rename tool .
You just have to create new object in child of the class "CyE_AssetsCleaner_RenameScript_Class" .
Then you have to override the "Rename" function.
In input you have a variable of type MAP, with in key the "PackageName" and "AssetName" in value.
In output you also have a variable of type MAP, "PackageName" in key which must match the package name that is input, and in value you have the new name modify, or in the case of the filter the original name.