My mistake i read cacher as cache. The problem to fin a cache hidden by a owner starting with 8 is harder.
A problem is if it is the name in the hidden by field on the cache that are asked for in the challenge och the name of the CO. The hidden by can be anything the owner likes and thera ant no good way to look for it on pgc. The name of the owner is possible and often the same as the hidden by field.
To find hiders in an area the top hidden function is probably the best. Below is a url for the stat of Virginia. you can add filter att county too. The you have to manualy do down the list and look for a hider with the correct nick
http://project-gc.com/Statistics/TopHidden?country=United+States®ion=Virginia&submit=Filter&chartpage=1
The fist one i found in Virginia was 8pointhunter. I looked in DC but did not find any but i might be mistake and I have not looked in Maryland.
To create a map with a owners hides on PGC you have to create a custom filter. It is a paying member function located in the meny with your name on the far right side. The filter can then be used in for example map compare.
If you use GSAK or now a local user it is trivial to find the answer if you have the caches in your database