Here at WPW?
I asked the same question some months back I think, but did not get any answer.
Easy method:
WPW must supply that as an ooption on their RSS feed.
Hard way:
It should also be possible to filter your own posts if the RSS service is general. That requires som programming.
Hint: PHP XML (RSS) parsing (combined with XPath technology?).
KW search:
PHP XML parsing + XPath site:
www.php.net
PHP XML parsing + XPath
PHP XML parsing site:
www.php.net
PHP XML parsing
Replace XML in above search with RSS.
Your posts may be unique on your name or an other ID, so it is possible for you to filter them.
Note that if you have the RSS feed / page, XPath is a query language on XML (RSS) nodes. May be it is not specific enough so you must write your own query that filters on your id.
I have some PHP code that you may use / modify. PM me if you want it.