# Local Users Security ## 👥 What are local users security ? Local users security allows you to restrict access based on the existing ngSurvey [users ](/multi-user-management/users.md)or [groups](/multi-user-management/groups.md) that are registered within ngSurvey's [users system](/multi-user-management/users.md) . ## 🔅 Local users security properties * **`Allow multiple submissions`** respondents can take part multiple time to the same survey. * **`Single sign on`** user must be already logged in using their ngSurvey account credentials. {% hint style="info" %} Once activated its possible to use the logged in user or group in any of our [condition rule](/form-management/form-designer/condition-rules/conditions-rules.md) within on our form. As such its possible to show / hide specific questions based on the current user or its groups. {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.ngsurvey.com/form-management/security/security-items/local-users-security.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.