One License Manager can work with one license key at a time. It is impossible to activate two license keys on the same computer, otherwise the new license key will replace the existing key and you will lose licenses. Before activating a new key on a machine, you need to deactivate the existing license from it.
If you purchase several LoadComplete licenses, get several license keys and want to use all of them at the same time, you will need several License Manager PCs - one PC per key. This is a general solution that will work with any license type.
For some license types you can use another solution: merge licenses, get one license key and then activate the key on the desired machine.
The structure of license keys allows you to have several virtual user collections in one key. For example, a merged key may contain several 500-, 1000- and other virtual user collections. However, it is impossible to have several product types in one key (like Node-Locked and Floating User, Subscription and Perpetual), so only certain license types can be merged, namely:
Two or more Perpetual Floating User licenses.
Two or more Subscription Floating User licenses that have the same expiration date.
These licenses can be merged and activated on the same PC. For example, if you want to activate two Floating User licenses, you need to merge them first and use a single key for activation.
The other license types cannot be merged, for example:
Subscription licenses with different expiration dates cannot be merged and activated on the same computer.
Subscription and Perpetual licenses cannot be merged and activated on the same computer.
It is impossible to activate Node-Locked and Floating User licenses on the same computer.
It is impossible to merge and activate two Node-Locked licenses on a computer (that would make no sense).
To activate these licenses, you must use different License Manager PCs.