1) Configure VHost of windows first by editing this file C:\Windows\System32\drivers\etc\hosts
127.0.0.1     localhost
127.0.0.2     test1.yourdomain.com
127.0.0.3     test2.yourdomain.com

2) Configure Bitnami VHost by editing this file C:\Bitnami\wampstack-7.0.16-1\apache2\conf\bitnami\bitnami-apps-vhosts.conf
Add as many virtualhosts as you need.

VirtualHost test1.yourdomain.com:8070
  DocumentRoot "C:/Users/you/Documents/_www_php70/ws"
  Directory "C:/Users/you/Documents/_www_php70/ws"
    Options Indexes FollowSymLinks
    AllowOverride All
   IfVersion < 2.3
      Order allow,deny                          
      Allow from all
    /IfVersion
    IfVersion >= 2.3 
      Require all granted
    /IfVersion
  

  # Error Documents
  ErrorDocument 503 /503.html

  # Bitnami applications installed with a prefix URL (default)
  Include "C:/Bitnami/wampstack-7.0.16-1/apache2/conf/bitnami/bitnami-apps-prefix.conf"
/VirtualHost