Hello Murat
If you have R5 in AS24 then yes, R2 will be able to advertise 1.1.1.1 to R5 as well. The No Export community only restricts routers from sharing particular routes with other eBGP neighbors. iBGP neighbors are not affected and they can freely share these routes between themselves.
Remember that this community is applied to particular routes, not to all routes in general. In this example, R1 sends the 1.1.1.1 route with the no export community set. This means that R2 will behave accordingly ONLY for that one particular route. All other routes can be shared freely according to the default behaviour of BGP.
I hope this has been helpful!
Laz