I don't think it's possible to pass a url parameter to only some of the views on a dashboard, but not others.
However, I think you could work around this by:
1) Duplicating the field you are using as the filter in the url
2) Name the duplicate field slightly differently (I'll call it [Copy of Filter])
3) Add the [Copy of Filter] to only the views you want it to impact
4) change the url parameter to pass values to the [Copy of Filter] field.
That way, you can leave the "Original Filter" alone, or even expose it for the users on the dashboard if desired...