How to Change Website's Error Log Location?

In vHost Conf, the location of the access log of a website is set using this:

CustomLog /home/mydomain.com/logs/mydomain.com.access_log combined

How can I change the error log of a website to access something similar to this:

home/mydomain.com/logs/mydomain.com.error_log

'Cause it’s so hard to locate each site’s error log under:

/usr/local/lsws/logs/error.log