Hi and welcome to Power Automate,
The MS Forms have a few limitations when integrating withPower Automate.
When configuring your MS Form, it is possible to limit the submissions to only one per user. This is a setting from MS Forms itself, and not actually from Power Automate. For your use case, however, it looks like you are expecting a few more submissions for each employee. In that case, as far as I know, you would need to use a tool different from a MS Form to collect the responses, like a Power App.
Alternatively, if you have any processes being triggered after this Form submissions, you can receive the employee's forms for a limited qty of times (let's say 3), and when they submit the form a 4th time, you simply put a condition in your flow to not process further this submission and notify them via email. It won't prevent the users to keep filling in the form as many times as they want, but at least your flow won't process further these overlimit submissions.
Let me know if it works for you or if you need any additional help!
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