Hi,

To restrict users so they can only edit their own blog posts in Odoo 17 Community, you'll need to create specific access control rules and record rules. Here's a steps to achieve this:

Step 1: Create a New Security Group

1. Log in to your Odoo instance: Ensure you have administrator access.

2. Go to Settings:

   - Navigate to the Settings menu.

   - Activate the developer mode by clicking on your user profile in the top right corner and selecting Activate the developer mode.

3. Access Groups:

   - Go to Settings > Users & Companies > Groups.

   - Click on Create to create a new group.

   - Name the group, for example, "Blog Post Authors".

Step 2: Create Access Control Rules

1. Define Access Rights:

   - While creating the group, go to the Access Rights tab.

   - Add the model `blog.post` and set the permissions for Read, Write, Create and Delete as required.

2. Create Record Rules for Blog Posts:

   - Go to Settings > Technical > Security > Record Rules.

   - Click on Create to add a new record rule. 

3. Record Rule for Blog Post Authors:

   - Name: Only Own Blog Posts

   - Object: blog.post

   - Domain Filter: `[('create_uid', '=', user.id)]`

   - Groups: Select the "Blog Post Authors" group you created.

   - Permissions: Set the permissions to apply the rule for Read, Write, Create, and Delete.

4. Save the Rule:

   - Save the record rule.

Step 4: Assign Users to the New Group

1. Assign Users:

   - Go to Settings > Users & Companies > Users.

   - Select the users you want to restrict.

   - In the Access Rights tab, add them to the "Blog Post Authors" group.

Hope it helps