How to write filter for specific page?

[Echo]

This works:
site.com#div(id=reallylonggenericid)

This doesn't:
site.com/User.aspx#div(id=reallylonggenericid)

How can I block it specifically on site.com/User.aspx? And it has to be that exactly, because I don't want it blocked on site.com/User.aspx?id=123456 -- only on site.com/User.aspx.

[mapx]

if we are talking about hiding filters (filters created for inline elements, html elements):

"Due to the way how element hiding is implemented, you really can only limit it to full domain names."

from en/filters#elemhide_domains

This means you can use only the first form:
site.com#div(id=reallylonggenericid)
or
site.com###reallylonggenericid

The blocking filters can be written for any part of a web address.
||example.com/folder1/folder2/abc$script

[lewisje]

Also, the OP is a real blast from the past, using the long-deprecated "simplified element-hiding syntax" that I thought would have been removed by now.