Also you could create a filter with SQL Query which includes computers you like to exclude from Agent Push target and configure a new target using your custom filter.
1) On the Scheduled Push, click X to remove the default target;
2) Select Apply To -> Resources
3) Configure the new target like this:
Exclude resources not in Filter Windows Computers with Windows Computers with no Symantec Management Agent Installed
Exclude resources in Filter Remote Computers (the custom filter you've created)
If you need help to develop the filter's SQL Query, please let us know.
Regards,
Fábio Sanches