You can filter for a specific database using the following code sample:
SELECT
TOP 1
*
FROM msdb..restorehistory
WHERE destination_database_name = N'AdventureWorks'
AND TYPE = 'D'
ORDER BY restore_date DESC
-- Type D stands for database
-- Other types: F = File, G = Filegroup, I = Differential
-- L = Log, V = Verifyonly, R = Revert
Cristian Andrei Lefter, SQL Server MVP
MCT, MCSA, MCDBA, MCAD, MCSD .NET,
MCTS, MCITP - Database Administrator SQL Server 2005
http://sqlserver.ro