The definitive answer is…maybe.
If your ISP will allow you access to it…
If you have a login and password…
If you are not behind a firewall blocking 3306…
Then you should be able to connect to just about any mysql server using SQLyog.
If the server is on your local network then 1 & 3 are moot.
There are ways around #2 but they require additional information. (like what OS is your server running.)
=C=