PHP CLI Account Level INI Settings

For one application I need to change some of the PHP values which I really don't want to apply to all the accounts using this version of PHP. This was easy enough to implement using a .user.ini file. There are some support tasks which run through PHP CLI, via cron, which are not utilizing those custom directives. Short of altering the scripts to use the "php -c" option is there a way to tell the server that when running PHP CLI tasks for a specific account to include a directive file? Otherwise it looks like I will be left with altering the specific scripts/code or making these changes effective for all accounts that use that version of PHP on that server. Hoping there's a simple setting I've overlooked. Thank you in advance for any advice, JP