Sub user - can they have their own log-in?

Do I have to give access to all my forms or - can the sub users have their own log-in and just se the 2 forms that are relevant for them? 

Now it looks like I ( the owner of the account) have to be logged in if they are suposed to see their forms. 

You can easily share any forms with a Sub-Account User. Please have a look at the following article : 

https://www.jotform.com/help/232-How-to-Share-Forms-with-a-Sub-Account-User