We have a drayek router 2820, with two internet connects, wan 1 and wan 2. The router keeps changing up address because of the two connections. Is it possible to connect some computer to wan 1 and some to wan 2?

Assuming the 2820 is like my 2920...

You should be able to set a load balance policy that says which wan interface to use depending on what your source IP address is.

On my 2920, it's WAN->Load Balance Policy.

Click on the index 1, then add a rule for your first source IP address to use WAN1 or WAN2 or whatever.

-- gyre --