Required software development freelancer for OpenVPN Real/Public IP job

Dear,
All Viewers, I want to use OpenVPN Hosting Server Real Public IP by OpenWRT/DD-WRT OpenVPN client using TUN(Routing) Mode, I can purchase IP from my hosting provider as much as I want, I want those IP assign for my OpenVPN Tun Client

Example I have 3 OpenVPN clients & 6 Extra IP I want to assign 2 IPs for each client & only which IP I assign those can be used by that client not other IPs & also want to control each IP maximum Bandwidth.

I am sure concept is clear for experts, I will share a diagram, please write only who already done, this type of routing.

Skills & Expertise Required

software development