That's why I asked. Have tried, and the second domain site2.com went to wordpress of the site1.com.
I did: sudo site1.com -wp
Then, sudo site2.com -wp
When typing on url: site1.com, it went to wordpress of site1.com
Typing site2.com, it also went to wordpress of site1.com. because 2 domain point to the same IP address of the VPS. If web server has vhost it can analyze to go the exact wordpress site I want.
So, I'm not sure webinoly support vhost like this or not?