Use the Is User in Group condition to evaluate whether the current user belongs to a specific User Group.
When you add the Is User in Group condition, the Designer allows you to select the operator and User Group for evaluation, as shown in the following example:
You can select is or is not from the Operator drop-down list.
You can select one or more User Groups from the User Groups drop-down list. The list includes a search field, where you can look up User Groups by name.