Thanks for your question. Inbound filters is used to stop errors that you don't want Raygun to process on your behalf. This action is application specific and will apply to all users. To be clear, this means if one person makes a change to an app's inbound filters, it will affect everyone's view and the information the application will process.
If you only want certain team members to be able to set up inbound filters for your applications, you can use our granular permissions feature to specify who has access to this feature.
If User A simply wants to have a different view (only see crashes from Machine A or a tag or a version), then the way to do it is by using the error group filters at the top of Crash Reporting, to filter the error groups down to the information they want to see. This will not affect the errors that Raygun processes for your application or anyone else's view.
Hope that helps :)
VP of Product