NFViews not only let you show entries in the frontend but also give you control over which entries to show. It has built-in settings that give let you filter Ninja Forms entries by field values.
Steps to Filter Entries by Field Value with NFViews
1. First edit your view
Open Views -> All Views to get a list of all the views you have created. Edit the one for which you want to enable filter by field value.

2. Click on Filter Settings
Go to the View Settings in the sidebar and open Filter Settings panel and then click on Edit Filter Conditions.

3. Select the Form Field to filter results
Click on the Add Group button. You will get three fields in a row with options to select the form field, condition, and value to compare with. You can filter by multiple field values by clicking on the AND icon which creates the AND relation between the filter conditions.
If you want to create OR relation between the conditions you can click on the Add New OR Group button.
View will display only those entries that match ALL filter conditions.

4. Save View
Click on the Save View button at the top right to save the changes. Your frontend view will now only show the entries which match the field conditions you have just set.

