To be able to view their tasks, the users need to log into the system and navigate to the page with the list. However, you want each user to see only his/her tasks, and that can be achieved with a single condition. In Condition Settings we are going to set the Field to Assignee and Action to Logged in User's Email. This way the logged in user will only see those entries of the list, where the Assignee field corresponds to his/her email address. The below GIF illustrates this.