> For the complete documentation index, see [llms.txt](https://docs.ngsurvey.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ngsurvey.com/form-management/security/security-items/local-users-security.md). # 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 This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## 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, and the optional `goal` query parameter: ``` GET https://docs.ngsurvey.com/form-management/security/security-items/local-users-security.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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.