For example: 
Due to the situation described in https://support.symantec.com/en_US/article.TECH249167.html  the customer decides to install just IVA18-001-KB4072698 and would like to ignore MSNS18-01-4078130 in the compliance reports.

If you run the "Compliance by Computer" report, then one of the selections is "Distribution Status" , select "Downloaded" from there.
This is one method to "ignore" bulletins you do not want to download/install. Another option is to use a custom severity to distinguish between bulletins.

If both of the bulletins have been downloaded, then disable one which you do not want. 
Delete unused Software Update Packages: https://support.symantec.com/en_US/article.HOWTO38239.html