Entity Framework Core: Multiple Relationships between Users and Organizations

I have 2 model classes for Users and Organizations.

public class User : IdentityUser
{
    [Required]
    public string Name { get; set; }
    [Required]
    public string Surname { get; set; }

    public int? OrganizationID { get; set; }

    public virtual OrgList org { get; set; }
}

public class OrgList
{
    public OrgList()
    {
        employees = new HashSet<User>();
    }

    public int id { get; set; }
    public String name { get; set; }
    public String ownerId { get; set; }

    public virtual ICollection<User> employees { get; set; }
    public virtual User ownerUser { get; set; }
}

User can be owner of some organization and also he is employee of the same organization (But other employees can't be owners of the organization).

First i've created a relationship for employees and it works OK

modelBuilder.Entity<OrgList>(entity =>
{
    entity.HasMany(e => e.employees)
        .WithOne(e => e.org)
        .HasForeignKey(e => e.OrganizationID)
        .OnDelete(DeleteBehavior.SetNull);
}

but when i try to add another relationship for owner

entity.HasOne(e => e.ownerUser)
    .WithOne(e => e.org)
    .HasForeignKey<OrgList>(e => e.ownerId)
    .OnDelete(DeleteBehavior.Cascade);

i have an error on migration:

Cannot create a relationship between 'User.org' and 'OrgList.ownerUser', because there already is a relationship between 'OrgList.employees' and 'User.org'. Navigation properties can only participate in a single relationship.

How can i fix it? I've found an answers for EF6 (not EF Core) with HasOptional() and WithOptionalPrincipal() methods that not exist in EF Core.

Can i do it without creating additional table for employees or without creating additional virtual OrgList on User class?