setting resource limits per user with cgroups v2 enabled

[jaimin bhaduri]

I set cpuquota, memorymax, memoryhigh, tasksmax, etc in
/etc/systemd/system/user-1000.slice.d/override.conf file so that user's
processes follow these resource limits. But these limits get enforced on
user's processes started from user's terminal only but not from root's
terminal doing su [user] or processes started from php scripts that run
after stepping down as the user through cron.
I understand that to set resource limits of a cgroup on a process, the
process has to be moved to the cgroup.
So is there a way to automatically detect when a user's process starts,
execute a bash script to fetch its pid and move it to the cgroup?
I am looking for some external daemon which can do this easily? Or do I
have to make .service and .sh files? What do you guys suggest?
I want to do this for multiple users in debian 11, almalinux 9 and ubuntu
22?
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