point a new URL to existing site while maintaining the old URL

We have recently gone through a name change from "LFGSM Toastmasters" (Lake Forest Graduate School of management) to "Lake Forest Toastmaster.
We would like to use either lf.toastmastersclubs.org or lakeforest.toastmastersclubbs.org as our new URL but would like the old URL lfgsm.toastmastersclubs.org to resolve to the same site for all previous members that still may have it cached in their systems. is this possible?

Lake Forest Toastmaster
1291391
Respectfully
Matt Prazenka
Mattprazenka@gmail.com

Also as an aside my email addresses mattprazen@gmail.com and matt@prazenka.com seem to be locked out from the support forum, could we clear those and I will consolidate under one of the addresses

1) we don't do redirects
2) You never activated the users attached to mattprazen@gmail.com and matt@prazenka.com I have deleted them.