how to start an application in a seperate instance?

[Arne Götje (=?utf-8?q?=E9=AB=98=E7=9B=9B=E8=8F=AF?=)]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi list,

suppose I have already one instance of an application running, and I 
want t start another instance but with different environment variables.
Currently If I open a terminal window, change the environment variables 
and start the program, it will inherince the environment varaibles from 
the already running instance and merge with that one. 
How can I disable this?

Cheers
Arne
- -- 
Arne Götje (高盛華) <arne at linux.org.tw>
PGP/GnuPG key: 1024D/685D1E8C
Fingerprint: 2056 F6B7 DEA8 B478 311F  1C34 6E9F D06E 685D 1E8C
Key available at wwwkeys.pgp.net.   Encrypted e-mail preferred.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.5 (GNU/Linux)

iD8DBQFBExqGbp/QbmhdHowRApiCAJ9/QDkyKu6HW9A8WBowan5hmzzZ4QCdEz86
6IFBHWdUOBCmR9xGTJstmfM=
=mtHg
-----END PGP SIGNATURE-----
___________________________________________________
This message is from the kde mailing list.
Account management:  https://mail.kde.org/mailman/listinfo/kde.
Archives: http://lists.kde.org/.
More info: http://www.kde.org/faq.html.